Construction of lower and upper solutions for first-order periodic problem
Crossref DOI link: https://doi.org/10.1186/s13661-015-0457-7
Published Online: 2015-10-20
Published Print: 2015-12
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Ma, Ruyun
Zhang, Lu
License valid from 2015-10-20