%0 Journal Article
%A EARL A. CODDINGTON
%T On self-adjoint ordinary differential operators.
%J Mathematica Scandinavica
%D 1956
%P 9-21
%V 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1956__4_165604/
%F MS2_1956__4_165604