%0 Journal Article
%A A. P. Oskolkov
%T Prior estimates of the first derivatives for two-dimensional quasi-linear strongly elliptic systems
%J Informatics and Automation
%D 1966
%P 192-202
%V 92
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TRSPY_1966_92_a12/
%G ru
%F TRSPY_1966_92_a12