兰德新+陈文斌

References：

[1] NGUYEN P C. Periodic solutions of a second order nonlinear system[J]. J Math Anal Appl， 1997，214（1）：219-232.

[2] LU S P， GE W G. Periodic solutions for a kind of Liénard equation with a deviating argument[J]. J Math Anna Appl， 2004，289（2）：231-243.

[3] CHENG W S， REN J L. On the existence of periodic solution for P-Laplacian generalized Liénard equation[J]. Nonlinear Anal， 2005，60（1）：65-75.

[4] GAO F B， LU S P. New results on the existence and uniqueness of preiodic solutions for Liénard equation type P-Laplacian equation[J]. J Franklin Institute， 2008，345（2）：374-381.

[5] GAO H， LIU B W. Existence and uniqueness of periodic solutions for forced Rayleigh-type equations[J]. Appl Math Comput， 2009，211（1）：148-154.

[6] BONHEURE D， HABETS P， OBERSNEL F， et al. Classical and non-classical solutions of a prescribed curvature equations[J].J Diff Equ， 2007，243（1）：208-237.

[7] LOPEZ R. A comparison result for radial solutions of the mean curvature equation[J]. Appl Math Lett， 2009，22（4）：860-864.

[8] PAN H. One-dimensional prescribed mean curvature equation with exponential nonlinearity[J]. Nonlinear Annl， 2009，70（5）：999-1010.

[9] GAINES R E， MAWHIN J. Coincidence degree and nonlinear differential equaations[M].Berlin：Springer， 1977.

[10] LU S P， GE W G. Sufficient conditions for the existence of periodic solutions to some second order differential equations with a deviating argument[J].J Math Anal Appl， 2005，308（2）：393-419.

（编辑 CXM）