%0 Journal Article
%A M. J. Mardanov
%T On optimality conditions for singular equations
%J Doklady Akademii Nauk
%D 1980
%P 815-818
%V 253
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1980_253_4_a9/
%G ru
%F DAN_1980_253_4_a9