%0 Journal Article
%A S. Ya. Serovaiskii
%T An optimal control problem for a~nonlinear elliptic equation with a~phase constraint and state variation
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 2013
%P 81-86
%N 9
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_2013_9_a10/
%G ru
%F IVM_2013_9_a10