共 50 条
- [31] Periodic Solutions of Second Order Degenerate Differential Equations with Delay in Banach Spaces [J]. CANADIAN MATHEMATICAL BULLETIN-BULLETIN CANADIEN DE MATHEMATIQUES, 2018, 61 (04): : 717 - 737
- [36] Linear connections for systems of second-order ordinary differential equations [J]. ANNALES DE L INSTITUT HENRI POINCARE-PHYSIQUE THEORIQUE, 1996, 65 (02): : 223 - 249
- [37] BOUNDED SOLUTIONS TO SYSTEMS OF ORDINARY SECOND-ORDER DIFFERENTIAL EQUATIONS [J]. DOKLADY AKADEMII NAUK SSSR, 1968, 180 (02): : 266 - &