%0 Journal Article
%A Souček, Vladimír
%T The minimum existence of functional $\int_a^b F( x(t), y(t), \dot{x}(t), \dot{y}(t) ) dt$
%J Commentationes Mathematicae Universitatis Carolinae
%D 1970
%P 205-225
%V 11
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_1970__11_2_a1/
%G en
%F CMUC_1970__11_2_a1