%0 Journal Article
%A Yu. Pesheva
%T Necessary Optimality Conditions for Systems of Neutral Type Obtained by a Special Variation
%J Mathematica balkanica
%D 1999
%P 7
%V 13
%N 1-2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MABA_1999_13_1-2_a1/
%F MABA_1999_13_1-2_a1