%0 Journal Article
%A Yu. M. Berezanskii
%T Energy inequalities for some classes of equations of mixed type
%J Doklady Akademii Nauk
%D 1960
%P 9-12
%V 132
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1960_132_1_a0/
%G ru
%F DAN_1960_132_1_a0