%0 Journal Article
%A A. V. Bitsadze
%T On the problem of equations of mixed type
%J Informatics and Automation
%D 1953
%P 3-59
%V 41
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TRSPY_1953_41_a0/
%G ru
%F TRSPY_1953_41_a0