Xu, Xiangjin Subharmonics for first order convex nonautonomous Hamiltonian systems. (English) Zbl 1082.37063 J. Dyn. Differ. Equations 15, No. 1, 107-123 (2003). MSC: 37J45 34C25 58E05 PDF BibTeX XML Cite \textit{X. Xu}, J. Dyn. Differ. Equations 15, No. 1, 107--123 (2003; Zbl 1082.37063) Full Text: DOI
Liu, Chun-Gen Subharmonic solutions of Hamiltonian systems. (English) Zbl 0957.37061 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 42, No. 2, 185-198 (2000). Reviewer: Mircea Crâşmăreanu (Iaşi) MSC: 37J45 PDF BibTeX XML Cite \textit{C.-G. Liu}, Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 42, No. 2, 185--198 (2000; Zbl 0957.37061) Full Text: DOI