%0 Journal Article
%A Ph. Hartman
%T On boundary value problems for systems of ordinary, nonlinear, second order differential equations
%J Matematika
%D 1962
%P 69-86
%V 6
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAT_1962_6_5_a6/
%G ru
%F MAT_1962_6_5_a6