共 50 条
[31]
SINGULARITIES OF ATTRACTIVE AND REPULSIVE TYPE TO FOURTH-ORDER NEUTRAL LIENARD EQUATIONS WITH TIME-DEPENDENT DEVIATING ARGUMENTS
[J].
JOURNAL OF NONLINEAR FUNCTIONAL ANALYSIS,
2019, 2019
[37]
PERIODIC SOLUTIONS OF SOME CLASSES OF CONTINUOUS SECOND ORDER DIFFERENTIAL EQUATIONS
[J].
DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS-SERIES B,
2017, 22 (02)
:477-482
[38]
Oscillatory Periodic Solutions of Nonlinear Second Order Ordinary Differential Equations
[J].
Acta Mathematica Sinica,
2005, 21
:491-496