Papers cited by others

Citations (up to 2012.2.5.)

| 70-79 | 60-69 | 50-59 | 40-49 | 30-39 | 20-29 | 10-19 | 00-09 |

Paper is cited by the following 2 items:

G.A. Monteiro & M. Tvrdy, Generalized linear differential equations in a Banach space: continuous dependence on a parameter, Discrete Contin. Dyn. Syst., 2011. http://www.math.cas.cz/~tvrdy/magimi.pdf
Z. Halas & M. Tvrdy, Approximated solutions of generalized linear differential equations, Preprint, 2009.

Paper is cited by the following 2 items:

G.A. Monteiro & M. Tvrdy, Generalized linear differential equations in a Banach space: continuous dependence on a parameter, Discrete Contin. Dyn. Syst., 2011. http://www.math.cas.cz/~tvrdy/magimi.pdf
Z. Halas & M. Tvrdy, Approximated solutions of generalized linear differential equations, Preprint, 2009.

Paper 73 is cited by the following 3 items:

X. He & X.H. Tang, Commun. Pure Appl. Anal., 11 (2012), 465--473.
Q.-M. Zhang & X. He, Lyapunov-type inequalities for a class of even-order differential equations, J. Inequalities Appl., 2012:5 (2012), 11 pp.
X.H. Tang & Q.-M. Zhang, Lyapunov inequalities and stability for planar linear Hamiltonian systems, Preprint, 2011.

Paper 72 is cited by the following 1 item:

X.H. Tang & Q.-M. Zhang, Lyapunov inequalities and stability for planar linear Hamiltonian systems, Preprint, 2011.

Paper 71 is cited by the following 1 item:

J. Chu, J. Ding & Y. Jiang, Lyapunov stability of elliptic periodic solutions of nonlinear damped equations, Preprint, 2011.

Paper 69 is cited by the following 3 items:

W. Li & P. Yan, Abstr. Appl. Anal., Vol. 2009 (2009), Art. ID 109757, 27 pp.

W. Li & P. Yan, Commun. Comtemp. Math., 12 (2010), 977--996.

P. Yan, Bound. Value Probl., Vol. 2010 (2010), Art. ID 690342, 21 pp.

Paper 68 is cited by the following 1 item:

G. Meng, Approximation of measures by smooth functions, Preprint, 2011.

Paper 66 is cited by the following 2 items:

W. Li & P. Yan, Commun. Comtemp. Math., 12 (2010), 977--996.
A. Fonda, M. Sabatini & F. Zanolin, Periodic solutions of perturbated Hamiltonian systems in the plane by the use of the Poincare-Birkhoff theorem, Topol. Meth. Nonlinear Anal., 2011.

Paper 65 is cited by the following 1 item:

F. Genoud & B.P. Rynne, Commun. Appl. Anal., 15 (2011), 413--434.

Paper 64 is cited by the following 6 items:

R. Ma, C. Gao & R. Chen, Bound. Value Probl., Vol. 2010 (2010), Art. ID 626054, 18 pp.
A. Cabada & J.A. Cid, Abstr. Appl. Anal., vol. 2011 (2011), Art. ID 545264, 19 pp.
R. Hakl & P.J. Torres, Appl. Math. Comput., 217 (2011), 7599--7611.
B. Yang, R. Ma & C. Gao, Appl. Math. Comput., 218 (2011), 4538--4545.
J. Chu, N. Fan & P.J. Torres, J. Math. Anal. Appl., 338 (2012), 665--675.
X.H. Tang & Q.-M. Zhang, Lyapunov inequalities and stability for planar linear Hamiltonian systems, Preprint, 2011.

Paper 63 is cited by the following 1 item:

G.A. Monteiro & M. Tvrdy, Generalized linear differential equations in a Banach space: continuous dependence on a parameter, Discrete Contin. Dyn. Syst., 2011. http://www.math.cas.cz/~tvrdy/magimi.pdf

Paper 62 is cited by the following 3 items:

W. Li & P. Yan, Abstr. Appl. Anal., Vol. 2009 (2009), Art. ID 109757, 27 pp.

P. Yan, Bound. Value Probl., Vol. 2010 (2010), Art. ID 690342, 21 pp.
P.A. Binding, P.J. Browne & B.A. Watson, Operators & Matrices, 6 (2011), 649--664.

Paper 60 is cited by the following 1 item:

J. Chu, J. Ding & Y. Jiang, Lyapunov stability of elliptic periodic solutions of nonlinear damped equations, Preprint, 2011.

Paper 59 is cited by the following 1 item:

X.H. Tang & Q.-M. Zhang, Lyapunov inequalities and stability for planar linear Hamiltonian systems, Preprint, 2011.

Paper 58 is cited by the following 9 items:

C. Bereanu, P. Jebelean & J. Mawhin, Discrete Contin. Dynam. Syst., 28 (2010), 637—648.
Q. Liu, D. Qian & Z. Wang, Nonlinear Anal., 73 (2010), 2071--2077.
J. Chu & T. Xia, Abstr. Appl. Anal., Vol. 2010 (2010), Art. ID 286040, 12 pp.
C. Bereanu, P. Jebelean & J. Mawhin, J. Dynam. Differential Equations, 22 (2010), 463--471.
J. Mawhin, Milan J. Math., 79 (2011), 95--112. [Survey]
J.A. Cid & P.J. Torres, On the existence and stability of periodic solutions for pendulum-like equations with friction and φ–Laplacian, Discrete Contin. Dyn. Syst., 2011.
J. Chu, J. Ding & Y. Jiang, Lyapunov stability of elliptic periodic solutions of nonlinear damped equations, Preprint, 2011.
J. Mawhin, Resonance problems for some non-autonomous ordinary differential equations, Preprint, 2011. [Survey]
S. Maro, Periodic solutions of a forced relativistic pendulum via twist dynamics, Preprint, 2011. http://www.ugr.es/~ecuadif/fuentenueva.htm

Paper 57 is cited by the following 3 items:

P. Yan, Bound. Value Probl., Vol. 2010 (2010), Art. ID 690342, 21 pp.
X. Yang, J. Optim. Theory Appl., 152 (2012), 814--822.
G. Meng, Approximation of measures by smooth functions, Preprint, 2011.

Paper 56 is cited by the following 3 items:

W. Li & P. Yan, Abstr. Appl. Anal., Vol. 2009 (2009), Art. ID 109757, 27 pp.
P. Yan, Bound. Value Probl., Vol. 2010 (2010), Art. ID 690342, 21 pp.
G. Meng, Approximation of measures by smooth functions, Preprint, 2011.

Paper 55 is cited by the following 3 items:

C. Yuan, D. Jiang & X. Xu, Math. Probl. Engineering, Vol. 2009 (2009), Art. ID 535209, 17 pp.
R. Ma & C. Gao, J. Math. Anal. Appl., 387 (2012), 1160—1166.
P.J. Torres, Z. Cheng & J. Ren, Non-degeneracy and uniqueness of periodic solutions for 2n-order differential equations, Preprint, 2011.

Paper 54 is cited by the following 1 item:

W. Li & P. Yan, Commun. Comtemp. Math., 12 (2010), 977--996.

Paper 53 is cited by the following 3 items:

J. Chu & T. Xia, Abstr. Appl. Anal., Vol. 2010 (2010), Art. ID 286040, 12 pp.
J. Chu, N. Fan & P.J. Torres, J. Math. Anal. Appl., 338 (2012), 665--675.
J. Chu, J. Ding & Y. Jiang, Lyapunov stability of elliptic periodic solutions of nonlinear damped equations, Preprint, 2011.

Paper 52 is cited by the following 8 items:

J. Chu & M. Li, J. Math. Anal. Appl., 355 (2009), 830--838.

J. Chu & J.J. Nieto, Bound. Value Probl., Vol. 2009 (2009), Art. ID 540863, 20 pp.
梁树青，《Duffing型方程与奇异方程周期解的存在性和稳定性》，清华大学博士论文，2010.
Q. Liu, D. Qian & Z. Wang, Nonlinear Anal., 73 (2010), 2071--2077.
J. Chu & T. Xia, Abstr. Appl. Anal., Vol. 2010 (2010), Art. ID 286040, 12 pp.
J. Chu & Z. Zhang, Bull. Austral. Math. Soc., 82 (2010), 437--445.
J. Chu, J. Ding & Y. Jiang, Lyapunov stability of elliptic periodic solutions of nonlinear damped equations, Preprint, 2011.
X.H. Tang & Q.-M. Zhang, Lyapunov inequalities and stability for planar linear Hamiltonian systems, Preprint, 2011.

Paper 51 is cited by the following 3 items:

W. Li & P. Yan, Abstr. Appl. Anal., Vol. 2009 (2009), Art. ID 109757, 27 pp.
W. Li & P. Yan, Commun. Comtemp. Math., 12 (2010), 977--996.
P. Yan, Bound. Value Probl., Vol. 2010 (2010), Art. ID 690342, 21 pp.

Paper 50 is cited by the following 41 items:

J. Chu & J.J. Nieto, Bull. London Math. Soc., 40 (2008), 143—150.
杨雪，《常微分方程的周期解和边值问题》，吉林大学博士论文，2008年.
Y. Sun, Bound. Value Probl., Vol. 2008 (2008), Art. ID 574842, 9 pp.
J. Chu & D. Franco, J. Math. Anal. Appl., 344 (2008), 898—905.
H.-X. Li, Bull. Austral. Math. Soc., 78 (2008), 163--169.
A. Cabada & J.A. Cid, Appl. Math. Comput., 205 (2008), 303--308.
X. Li & Z. Zhang, Nonlinear Anal., 70 (2009), 2395--2399.
J. Chu & D. O'Regan, Acta Appl. Math., 105 (2009), 323--338.
H. Wang, Nonlinear Anal., 71 (2009), 1271--1275.
S. Liang & L. Mu, Nonlinear Anal., 71 (2009), 2497--2505.
Z. Cao & D. Jiang, Nonlinear Anal., 71 (2009), 3661--3667.
J. Chu & J.J. Nieto, Bound. Value Probl., Vol. 2009 (2009), Art. ID 540863, 20 pp.
R.P. Argawal, D. O'Regan & P.J.Y. Wong, Math. Comput. Modelling, 50 (2009), 999--1025.
S. Liang, Multiplicity of nontrivial periodic solutions for second order dynamical systems, in "Proc. 8th Intern. Conf. Information Management Sci.", Vol. 8, pp. 940—944, 2009.
R. Ma & H. Ma, Adv. Difference Equations, Vol. 2009 (2009), Art. ID 360871, 17 pp.
J. Chu, Nonlinear Anal., 72 (2010), 1983—1992.
R. Ma & H. Ma, Comput. Math. Appl., 59 (2010), 136--141.
J.R. Graef, L. Kong & B. Yang, Czech. Math. J., 60 (2010), 173—182.
S. Liang, Topol. Meth. Nonlinear Anal., 35 (2010), 127--137.
J. Chu & D. O'Regan, Taiwan. J. Math., 14 (2010), 329--345.
梁树青，《Duffing型方程与奇异方程周期解的存在性和稳定性》，清华大学博士论文，2010.
Z. Zhang & R. Yuan, Acta Appl. Math., 111 (2010), 171--178.
J. Chu & Z. Zhang, Acta Appl. Math., 111 (2010), 179--187.
廖芳芳，《甘肃联合大学学报（自然科学版）》, 24：No. 4 (2010),8—10 & 14.
H. Wang, J. Differential Equations, 249 (2010), 2986--3002.
Z. Cao, C. Yuan, D. Jiang & X. Wang, Math. Probl. Engineering, Vol. 2010 (2010), Art. ID 458918, 15 pp.
J. Chu & Z. Zhang, Bull. Austral. Math. Soc., 82 (2010), 437--445.
R. Ma, C. Gao & R. Chen, Bound. Value Probl., Vol. 2010 (2010), Art. ID 626054, 18 pp.
K. Zhang & W. Wang, Ann. Differential Equations, 26 (2010), 359—367.
F. Wang, Nonlinear Anal. Real World Appl., 12 (2011), 254--261.
P. Amster & M. Maurette, Adv. Nonlinear Stud., 11 (2011), 201—220.
J.R. Graef & L. Kong, J. Difference Equations Appl., 17 (2011), 831--839.
D.R. Anderson & R.I. Avery, J. Appl. Math. Comput., 37 (2011), 297--312.
H. Wang, Appl. Math. Comput., 218 (2011), 1605--1610.
B. Yang, R. Ma & C. Gao, Appl. Math. Comput., 218 (2011), 4538--4545.
F. Wang, Y. Wang & Y. An, Math. Probl. Engineering, Vol. 2011 (2011), Art. ID 610812, 12 pp.
A. Cernea, J. Appl. Math. Comput., 38 (2012), 133--143.
J. Chu, N. Fan & P.J. Torres, J. Math. Anal. Appl., 338 (2012), 665--675.
Z. Zhang & R. Yuan, Multiplicity of positive periodic solutions for damped differential equations with singularity, Preprint, 2010.
R. Ma, J. Li & R. Chen, Existence of positive solutions of nonlinear Neumann problems, Preprint, 2010.
Z. Chen & F. Wang, On positive doubly periodic solutions for a singular telegraph systems with twin-parameters, Preprint, 2011.

Paper 49 is cited by the following 5 items:

J. Chu, H. Chen & D. O'Regan, Math. Nachr., 281 (2008), 1549—1556.
J. Belmonte-Beitia, V.M. Perez-Garcia & P.J. Torres, J. Nonlinear Sci., 19 (2009), 437--451.
S.-P. Wang, F.-H. Wong & F.-K. Kung, Bound. Value Probl., Vol. 2010 (2010), Art. ID 961496, 12 pp.
D.-B. Wang, J.-P. Sun & X.-J. Li, Discrete Dynam. Nature Soc., Vol. 2010 (2010), Art. ID 371285, 13 pp.
J. Xu & Z. Yang, J. Appl. Math. Comput., 37 (2011), 13--35.

Paper 48 is cited by the following 2 items:

X.H. Tang & Q.-M. Zhang, Lyapunov inequalities and stability for planar linear Hamiltonian systems, Preprint, 2011.
P.J. Torres, Z. Cheng & J. Ren, Non-degeneracy and uniqueness of periodic solutions for 2n-order differential equations, Preprint, 2011.

Paper 46 is cited by the following 3 items:

W. Li & K. Lu, Trans. Amer. Math. Soc., 360 (2008), 5509--5528.
梁树青，《Duffing型方程与奇异方程周期解的存在性和稳定性》，清华大学博士论文，2010.
J. Chu, J. Ding & Y. Jiang, Lyapunov stability of elliptic periodic solutions of nonlinear damped equations, Preprint, 2011.

Paper 45 is cited by the following 13 items:

J. Chu & P.J. Torres, Bull. London Math. Soc., 39 (2007), 653--660.
杨雪，《常微分方程的周期解和边值问题》，吉林大学博士论文，2008年.
J. Chu & M. Li, Nonlinear Anal., 69 (2008), 276—286.
J. Chu & M. Li, J. Math. Anal. Appl., 355 (2009), 830--838.
J. Chu & J.J. Nieto, Bound. Value Probl., Vol. 2009 (2009), Art. ID 540863, 20 pp.
R.P. Argawal, D. O'Regan & P.J.Y. Wong, Math. Comput. Modelling, 50 (2009), 999--1025.
S. Liang, Topol. Meth. Nonlinear Anal., 35 (2010), 127--137.
梁树青，《Duffing型方程与奇异方程周期解的存在性和稳定性》，清华大学博士论文，2010.
R.P. Argawal, D. O'Regan & P.J.Y. Wong, Asympt. Anal., 67 (2010), 191--216.
J. Chu & Z. Zhang, Bull. Austral. Math. Soc., 82 (2010), 437--445.
K. Zhang & W. Wang, Ann. Differential Equations, 26 (2010), 359—367.
J. Chu, N. Fan & P.J. Torres, J. Math. Anal. Appl., 338 (2012), 665--675.
A. Fonda & M. Garrione, A Landesman-Lazer type condition for asymptotically linear second order equations with a singularity, Proc. Royal Soc. Edinburgh Sect. A, 2011.

Paper 44 is cited by the following 13 items:

F. Dalbono, Abstr. Appl. Anal., 11 (2004), 957--979.
A. Canada & S. Villegas, Discrete Cont. Dynam. Syst., 20 (2008), 877—888.
A. Canada & S. Villegas, Resultados recientes sobre desigualdades tipo Lyapunov para EDO, in XXI Congreso Ecuaciones Diferenciales y Aplicaciones / XI Congreso de Matematica Aplicada, pp. 1—8, 2009. [Survey]
A. Canada & S. Villegas, J. Math. Inequalities, 3 (2009), 631--643. [Survey]
A. Canada & S. Villegas, J. Eur. Math. Soc., 12 (2010), 163—178.
A. Cabada, J.A. Cid & M. Tvrdy, Nonlinear Anal., 72 (2010), 3436--3446.
梁树青，《Duffing型方程与奇异方程周期解的存在性和稳定性》，清华大学博士论文，2010.
A. Canada & S. Villegas, J. Math. Anal. Appl., 376 (2011), 429--442.
A. Canada & S. Villegas, Nonlinear Anal., 74 (2011), 1913--1925.
A. Canada & S. Villegas, An applied mathematical excursion through Lyapunov inequalities, classical analysis and differential equations, Bol. Soc. Esp. Mat. Apl., 2011. [Survey]
A. Canada & S. Villegas, Lyapunov inequalities for partial differential equations at radial higher eigenvalues, Discrete Contin. Dyn. Syst., 2011.
A. Canada & S. Villegas, Matrix Lyapunov inequalities for ordinary and elliptic partial differential equations, Preprint, 2008.
X.H. Tang & Q.-M. Zhang, Lyapunov inequalities and stability for planar linear Hamiltonian systems, Preprint, 2011.

Paper 43 is cited by the following 6 items:

J. Lei & P.J. Torres, Math. Proc. Cambridge Philos. Soc., 140 (2006), 359--368.
刘喜兰，《弹性梁方程边值问题》，兰州大学博士论文，2006.
P.J. Torres, Proc. Roy. Soc. Edinburgh Sect. A, 137 (2007), 195--201.
杨雪，《常微分方程的周期解和边值问题》，吉林大学博士论文，2008年.
P.G.L. Leach & K. Andropoulos, Appl. Anal. Discrete Math., 2 (2008), 146—157. [Survey]
J. Chu, J. Ding & Y. Jiang, Lyapunov stability of elliptic periodic solutions of nonlinear damped equations, Preprint, 2011.

Paper 42 is cited by the following 69 items:

J. Chu & Z. Zhou, Nonlinear Anal., 64 (2006), 1528--1542.
J. Wu & Y. Liu, Discrete Dynam. Nature Soc., Art. No. 78145, 2006.
杨树勍，齐素英，《忻州师范学院学报》，22:2 (2006), 28--30.
张广, 《青岛理工大学学报》, 27:5 (2006), 1--7, 38. [Survey]
J. Chu & D. O'Regan, Commun. Appl. Anal., 10 (2006), 185--199.
Y. Wang & G. Zhang, Far East J. Math. Sci., 23 (2006), 145—155
P.J. Torres, J. Differential Equations, 232 (2007), 277--284.
J. Wu, J. Math. Anal. Appl., 334 (2007), 738—752.
J. Wu & Y. Liu, J. Comput. Appl. Math., 206 (2007), 713—725.
J. Chu & P.J. Torres, Bull. London Math. Soc., 39 (2007), 653--660.
Y. Liu, Sdu Fen Edebiyat Fakultesi Fen Dergisi (E-Dergi), 2 (2007), 253—272.
杨和，《青海师专学报（教育科学）》，No. 5 (2007), 35—38.
杨和，《甘肃科学学报》，19：4 (2007), 4—7.
D. Franco & P.J. Torres, Proc. Amer. Math. Soc., 136 (2008), 1229--1236.
杨雪，《常微分方程的周期解和边值问题》，吉林大学博士论文，2008年.
J. Chu & J.J. Nieto, Bull. London Math. Soc., 40 (2008), 143—150.
Y. Sun, Bound. Value Probl., Vol. 2008 (2008), Art. ID 574842, 9 pp.
J. Chu & M. Li, Nonlinear Anal., 69 (2008), 276—286.
X. Li & J. Zhang, J. Difference Equations Appl., 14 (2008), 835—850.
S. Hong & J. Chen, J. Comput. Appl. Math., 221 (2008), 66—75.
J. Chu, H. Chen & D. O'Regan, Math. Nachr., 281 (2008), 1549—1556.
X. Li & Z. Zhang, Nonlinear Anal., 69 (2008), 3866—3876.
H.-X. Li, Bull. Austral. Math. Soc., 78 (2008), 163--169.
A. Cabada & J.A. Cid, Appl. Math. Comput., 205 (2008), 303--308.
J. Belmonte-Beitia, Electr. J. Differential Equations, 2008 (2008), No. 148, 1—6.
J. Chu & D. O'Regan, Commun. Appl. Anal., 12 (2008), 235—244.
X. Li & Z. Zhang, Nonlinear Anal., 70 (2009), 2395--2399.
W. Liu, L. Liu & Y. Wu, Appl. Math. Comput., 208 (2009), 511—519.
J. Chu & D. O'Regan, Acta Appl. Math., 105 (2009), 323--338.
J. Chu & M. Li, J. Math. Anal. Appl., 355 (2009), 830--838.
丁蕾，夏大峰，《北京联合大学学报（自然科学版）》, 23 (2009), 67--71.
S. Liang & L. Mu, Nonlinear Anal., 71 (2009), 2497--2505.
Z. Cao & D. Jiang, Nonlinear Anal., 71 (2009), 3661--3667.
J. Chu & J.J. Nieto, Bound. Value Probl., Vol. 2009 (2009), Art. ID 540863, 20 pp.
C. Miao, H. Pang & W. Ge, Electr. J. Qualitative Theory Differential Equations, 2009, No. 42, 1—16.
R.P. Argawal, D. O'Regan & P.J.Y. Wong, Math. Comput. Modelling, 50 (2009), 999--1025.
S. Liang, Multiplicity of nontrivial periodic solutions for second order dynamical systems, in "Proc. 8th Intern. Conf. Information Management Sci.", Vol. 8, pp. 940—944, 2009.
C. Miao, J. Zhao & W. Ge, Czech. Math. J., 59 (2009), 957--973.
J. Chu, Nonlinear Anal., 72 (2010), 1983—1992.
B. Liu, L. Liu & Y. Wu, Nonlinear Anal., 72 (2010), 3337--3345.
X. Hao, L. Liu & Y. Wu, Nonlinear Anal., 72 (2010), 3635--3642.
S. Liang, Topol. Meth. Nonlinear Anal., 35 (2010), 127--137.
J. Chu & D. O'Regan, Taiwan. J. Math., 14 (2010), 329--345.
梁树青，《Duffing型方程与奇异方程周期解的存在性和稳定性》，清华大学博士论文，2010.
R.P. Argawal, D. O'Regan & P.J.Y. Wong, Asympt. Anal., 67 (2010), 191--216.
Y. Zhou & M. Wu, Applications Math., 55 (2010), 189--196.
Z. Zhang & R. Yuan, Acta Appl. Math., 111 (2010), 171--178.
J. Chu & Z. Zhang, Acta Appl. Math., 111 (2010), 179--187.
廖芳芳，《甘肃联合大学学报（自然科学版）》, 24：No. 4 (2010),8—10 & 14.
H. Wang, J. Differential Equations, 249 (2010), 2986--3002.
Z. Cao, C. Yuan, D. Jiang & X. Wang, Math. Probl. Engineering, Vol. 2010 (2010), Art. ID 458918, 15 pp.
J. Chu & Z. Zhang, Bull. Austral. Math. Soc., 82 (2010), 437--445.
R. Ma, C. Gao & R. Chen, Bound. Value Probl., Vol. 2010 (2010), Art. ID 626054, 18 pp.
汤宇，赵虹，《数学的实践与认识》， 40(18) （2010）， 235—241.
R. Ma, Nonlinear Anal., 74 (2011), 1714--1720.
翁爱治,孙继涛,《数学物理学报》，31A (2011), 82—91.
A. Cabada & J.A. Cid, Abstr. Appl. Anal., vol. 2011 (2011), Art. ID 545264, 19 pp.
T. He, F. Yang, C. Chen & S. Peng, Comput. Math. Appl., 61 (2011), 3355—3363.
X. Li & Z. Zhang, Math. Nachr., 284 (2011), 1472--1482.
S. Zhong & Y. An, Bound. Value Probl., 2011, 2011:8, 6 pp.
B. Yang, R. Ma & C. Gao, Appl. Math. Comput., 218 (2011), 4538--4545.
王峰，孙经先，崔玉军，《系统科学与数学》， 31 （2011）， 975—984.
A. Cernea, J. Appl. Math. Comput., 38 (2012), 133--143.
J. Chu, N. Fan & P.J. Torres, J. Math. Anal. Appl., 338 (2012), 665--675.
Z. Cheng & J. Ren, Discrete Contin. Dyn. Syst., 32 (2012), 1557—1574.
Z. Wang & T. Ma, Nonlinearity, 25 (2012), 279—307.
Z. Zhang & R. Yuan, Multiplicity of positive periodic solutions for damped differential equations with singularity, Preprint, 2010.
Z. Chen & F. Wang, On positive doubly periodic solutions for a singular telegraph systems with twin-parameters, Preprint, 2011.
Y. Chen & S. Hong, Solvability of a class of integral inclusions, Preprint, 2011.

Paper 41 is cited by the following 6 items:

M. Kunze & R. Ortega, Adv. Nonlinear Stud., 4 (2004), 237--249.
J. Lei & P.J. Torres, Math. Proc. Cambridge Philos. Soc., 140 (2006), 359--368.
Y. Feng, Acta Appl. Math., 110 (2010), 895--905.
梁树青，《Duffing型方程与奇异方程周期解的存在性和稳定性》，清华大学博士论文，2010.
Y. Feng & G. Li, Arab. J. Sci. Engineering D, 35 (2010), 189--195.
P.J. Torres, Z. Cheng & J. Ren, Non-degeneracy and uniqueness of periodic solutions for 2n-order differential equations, Preprint, 2011.

Paper 40 is cited by the following 5 items:

Y. Liu, Electr. J. Diff. Equations, Vol. 2008 (2008), no. 96, pp. 1--52.
S. Lu, Nonlinear Anal., 69 (2008), 4215--4229.
F.B. Gao, W. Zhang, S.K. Lai & S.P. Chen, Nonlinear Anal., 71 (2009), 5906—5914.
C.-G. Kim, Acta Appl. Math., 112 (2010), 79--90.
F.B. Gao & W. Zhang, J. Franklin Inst., 348 (2011), 1020—1034.

Paper 39 is cited by the following 8 items:

J. Lei & P.J. Torres, Math. Proc. Cambridge Philos. Soc., 140 (2006), 359--368.

P.J. Torres, J. Differential Equations, 232 (2007), 277--284.

P.J. Torres, Proc. Roy. Soc. Edinburgh Sect. A, 137 (2007), 195--201.
X. Li & Z. Zhang, Nonlinear Anal., 69 (2008), 3866—3876.
H.-X. Li, Bull. Austral. Math. Soc., 78 (2008), 163--169.
J. Chu & M. Li, J. Math. Anal. Appl., 355 (2009), 830--838.
J. Chu, J. Ding & Y. Jiang, Lyapunov stability of elliptic periodic solutions of nonlinear damped equations, Preprint, 2011.
A. Gutierrez & P.J. Torres, Non-autonomous saddle-node bifurcation in a canonical electrostatic MEMS, Preprint, 2011.

Paper 38 is cited by the following 13 items:

储继峰，《二阶超线性排斥奇异方程的多重周期正解》，东北师范大学硕士论文，31页，2004年。
R. Ortega, The stability of the equilibrium: a search for the right approximation, in Ten Mathematical Essays on Approximation in Analysis and Topology (ed. J. Ferrera, J. Lopez-Gomez & F.R. Ruiz del Portal), pp. 215--234, Elsevier, 2005. [Survey]
J. Lei & P.J. Torres, Math. Proc. Cambridge Philos. Soc., 140 (2006), 359--368.
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方守文，《牛顿方程周期解的扭转特征和稳定性》，南京航空航天大学硕士论文，42页，2006年。
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F. Dalbono, 《Multiplicity Results for Superlinear and Asymptotically Linear Boundary Value Problems》, Ph.D. Thesis, Universita degli Studi di Genova, Italy, 2002.
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Paper 29 is cited by the following 8 items:

G.D. Montesinos, V.M. Perez-Garcia & P.J. Torres, Physica D, 191 (2004), 193--210.
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