A generalized mountain-pass theorem: the existence of multiple critical points
Crossref DOI link: https://doi.org/10.1007/s00526-016-1025-4
Published Online: 2016-07-15
Published Print: 2016-08
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Ruppen, Hans-Jörg
License valid from 2016-07-15