TY  - JOUR
AU  - Loewen, Philip D.
AU  - Wang, Xianfu
TI  - A Generalized Variational Principle
JO  - Canadian journal of mathematics
PY  - 2001
SP  - 1174
EP  - 1193
VL  - 53
IS  - 6
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-2001-044-8/
DO  - 10.4153/CJM-2001-044-8
ID  - 10_4153_CJM_2001_044_8
ER  -