%0 Journal Article
%A V. Bangert
%T A uniqueness theorem for Zn-periodic variational problems.
%J Commentarii mathematici Helvetici
%D 1987
%P 511-531
%V 62
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMH_1987__62_140095/
%F CMH_1987__62_140095