%0 Journal Article
%A I. D. Cherkasov
%T Equivalence groups of second order linear differential equations
%J Doklady Akademii Nauk
%D 1969
%P 50-52
%V 187
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1969_187_1_a12/
%G ru
%F DAN_1969_187_1_a12