%0 Journal Article
%A K. B. Mansimov
%T On the optimality of controls singular in the classical sense in Goursat--Darboux systems
%J Doklady Akademii Nauk
%D 1986
%P 808-812
%V 286
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1986_286_4_a7/
%G ru
%F DAN_1986_286_4_a7