%0 Journal Article
%A M. I. Vishik
%A L. A. Lyusternik
%T On some even order elliptic equations containing small parameters in higher derivative terms and degenerating 

%J Doklady Akademii Nauk
%D 1957
%P 962-965
%V 113
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1957_113_5_a3/
%G ru
%F DAN_1957_113_5_a3