%0 Journal Article
%A L. T. Ashchepkov
%T Singular extremals of discontinuous control systems. I
%J Diskretnyj analiz i issledovanie operacij
%D 1980
%P 3-13
%N 20
%U http://geodesic.mathdoc.fr/item/DA_1980_20_a0/
%G ru
%F DA_1980_20_a0