%0 Journal Article
%A F. TAKENS
%T The Minimal Number of Critical Points of a Function on a Compact Manifold and the Lusternik-Schnirelman Category.
%J Inventiones mathematicae
%D 1968
%P 197-244
%V 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM_1968__6_141942/
%F IM_1968__6_141942