%0 Journal Article
%A V. Ya. Ivrii
%T The wave fronts of the solutions of the system that describes crystal optics
%J Doklady Akademii Nauk
%D 1977
%P 763-765
%V 232
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1977_232_4_a7/
%G ru
%F DAN_1977_232_4_a7