%0 Journal Article
%A A. V. Bitsadze
%T On the theory of systems of partial differential equations
%J Informatics and Automation
%D 1976
%P 67-77
%V 142
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TRSPY_1976_142_a3/
%G ru
%F TRSPY_1976_142_a3