%0 Journal Article
%A G. N. Petrovskiǐ
%T The construction of coefficient tests for the $G$-orthogonal reducibility and $G$-spherical compatibility of systems of linear differential equations
%J Differencialʹnye uravneniâ
%D 1978
%P 637-645
%V 14
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DE_1978_14_4_a6/
%G ru
%F DE_1978_14_4_a6