Jia, Liqian; Chen, Guanwei Existence of periodic solutions for Hamiltonian systems with super-linear and sign-changing nonlinearities. (English) Zbl 1459.37054 J. Appl. Anal. Comput. 8, No. 5, 1524-1534 (2018). MSC: 37J46 34C25 37C27 70H12 70K42 PDF BibTeX XML Cite \textit{L. Jia} and \textit{G. Chen}, J. Appl. Anal. Comput. 8, No. 5, 1524--1534 (2018; Zbl 1459.37054) Full Text: DOI OpenURL
Yin, Qun; Liu, Deqing Periodic solutions of a class of superquadratic second order Hamiltonian systems. (English) Zbl 0974.34039 Appl. Math., Ser. B (Engl. Ed.) 15, No. 3, 259-266 (2000). Reviewer: Bin Liu (Beijing) MSC: 34C25 37J40 70H05 PDF BibTeX XML Cite \textit{Q. Yin} and \textit{D. Liu}, Appl. Math., Ser. B (Engl. Ed.) 15, No. 3, 259--266 (2000; Zbl 0974.34039) Full Text: DOI OpenURL