Multiplicity of Positive Periodic Solutions to Second Order Singular Dynamical Systems
Crossref DOI link: https://doi.org/10.1007/s00009-017-1000-0
Published Online: 2017-09-09
Published Print: 2017-10
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Li, Shengjun
Wang, Yanhua
License valid from 2017-09-09