Existence of positive periodic solutions of second-order differential equations with weak singularities
Crossref DOI link: https://doi.org/10.1186/s13661-014-0188-1
Published Online: 2014-09-25
Published Print: 2014-12
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Ma, You
License valid from 2014-09-25
Article History
Received: 25 June 2014
Accepted: 23 July 2014
First Online: 25 September 2014