%0 Journal Article
%A E. P. Dolzhenko
%A E. A. Sevast'yanov
%T Approximations with a~sign-sensitive weight: existence and uniqueness theorems
%J Izvestiya. Mathematics 
%D 1998
%P 1127-1168
%V 62
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IM2_1998_62_6_a3/
%G en
%F IM2_1998_62_6_a3