TY  - JOUR
AU  - J. H. Qiu
TI  - Ekeland's variational principle in Fréchet spaces
 and the density of extremal points
JO  - Studia Mathematica
PY  - 2005
SP  - 81
EP  - 94
VL  - 168
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/sm168-1-6/
DO  - 10.4064/sm168-1-6
LA  - en
ID  - 10_4064_sm168_1_6
ER  -