%0 Journal Article
%A I. Ekeland
%T Some lemmas about dynamical systems.
%J Mathematica Scandinavica
%D 1983
%P 262-268
%V 52
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1983__52_166843/
%F MS2_1983__52_166843