共 50 条
- [21] Periodic Solutions of Nonlinear Nonautonomous Systems of Ordinary Differential Equations Differential Equations, 2001, 37 : 598 - 602
- [27] ON THE EXISTENCE OF BOUNDED SOLUTIONS FOR SYSTEMS OF NONLINEAR GENERALIZED ORDINARY DIFFERENTIAL EQUATIONS MEMOIRS ON DIFFERENTIAL EQUATIONS AND MATHEMATICAL PHYSICS, 2008, 45 : 125 - 130
- [28] Existence of 2π-periodic solutions for nonlinear systems of first-order ordinary differential equations at resonance Nonlinear Anal Theory Methods Appl, 1 (01):
- [30] Existence and multiplicity of periodic solutions for a class of second-order ordinary differential equations Monatshefte für Mathematik, 2020, 193 : 829 - 843