%0 Journal Article
%A V. B. Korotkov
%T $T$-invariance of the coefficients of quasi-linear hyperbolic equations
%J Doklady Akademii Nauk
%D 1967
%P 271-274
%V 172
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1967_172_2_a5/
%G ru
%F DAN_1967_172_2_a5