%0 Journal Article
%A O. I. Morozov
%T Contact-equivalence problem for linear hyperbolic equations
%J Trudy Seminara im. I.G. Petrovskogo
%D 2006
%P 119-142
%V 25
%N 25
%U http://geodesic.mathdoc.fr/item/TSP_2006_25_25_a6/
%G ru
%F TSP_2006_25_25_a6