Existence of periodic solutions for a class of second order Hamiltonian systems
Crossref DOI link: https://doi.org/10.1186/s13661-015-0460-z
Published Online: 2015-10-29
Published Print: 2015-12
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Wang, Da-Bin
Yang, Kuo
License valid from 2015-10-29