%0 Journal Article
%A GUNNAR EHRLING
%T On a type of eigenvalue problems for certain elliptic differential operators
%J Mathematica Scandinavica
%D 1954
%P 267-285
%V 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1954__2_165550/
%F MS2_1954__2_165550