%0 Journal Article
%A V. F. Butuzov
%T Angular boundary layer in singularly perturbed mixed problems for the second-order hyperbolic equations
%J Doklady Akademii Nauk
%D 1977
%P 997-1000
%V 235
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1977_235_5_a1/
%G ru
%F DAN_1977_235_5_a1