%0 Journal Article
%A J. H. Qiu
%T Ekeland's variational principle in Fréchet spaces
 and the density of extremal points
%J Studia Mathematica
%D 2005
%P 81-94
%V 168
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/sm168-1-6/
%R 10.4064/sm168-1-6
%G en
%F 10_4064_sm168_1_6