Periodic solutions of a class of nonautonomous second-order Hamiltonian systems with nonsmooth potentials
Crossref DOI link: https://doi.org/10.1186/s13661-015-0292-x
Published Online: 2015-02-20
Published Print: 2015-12
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Ning, Yan
An, Tianqing
License valid from 2015-02-20