@article{bwmeta1.element.bwnjournal-article-smv72i1p11bwm,
author = {Jean Ollagnier and Didier Pinchon},
title = {The variational principle},
journal = {Studia Mathematica},
volume = {72},
year = {1982},
pages = {151-159},
zbl = {0503.28007},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-smv72i1p11bwm}
}
Ollagnier, Jean; Pinchon, Didier. The variational principle. Studia Mathematica, Tome 72 (1982) pp. 151-159. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-smv72i1p11bwm/