%0 Journal Article
%A R. Pirov
%T On certain nonlinear systems of partial differential equations of the second order
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 2017
%P 97-100
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_2017_1_a10/
%G ru
%F IVM_2017_1_a10