%0 Journal Article
%A A. A. Melikyan
%T Necessary optimality conditions for different phase portraits in a~neigh-borhood of a~singular arc
%J Trudy Instituta matematiki i mehaniki
%D 2006
%P 129-141
%V 12
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TIMM_2006_12_2_a11/
%G ru
%F TIMM_2006_12_2_a11