%0 Journal Article
%A L. M. Berkovich
%T Certain classes of difference and differential equations with variable coefficients
%J Izvestiâ vysših učebnyh zavedenij. Matematika
%D 1970
%P 13-25
%N 7
%I mathdoc
%U http://geodesic.mathdoc.fr/item/IVM_1970_7_a1/
%G ru
%F IVM_1970_7_a1