%0 Journal Article
%A N. H. Ibragimov
%T Group properties of wave equations for particles of zero mass
%J Doklady Akademii Nauk
%D 1968
%P 566-568
%V 178
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1968_178_3_a16/
%G ru
%F DAN_1968_178_3_a16