%0 Journal Article
%A Loewen, Philip D.
%A Wang, Xianfu
%T A Generalized Variational Principle
%J Canadian journal of mathematics
%D 2001
%P 1174-1193
%V 53
%N 6
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-2001-044-8/
%R 10.4153/CJM-2001-044-8
%F 10_4153_CJM_2001_044_8