%0 Journal Article
%A A. Addou
%A S. Lahrech
%T Sufficient conditions for elliptic problem of optimal control in~$\mathbb R^2$
%J Lobachevskii journal of mathematics
%D 2000
%P 3-17
%V 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/LJM_2000_6_a0/
%G en
%F LJM_2000_6_a0