%0 Journal Article
%A Rainer Wüst
%T Generalisation of Rellich's Theorem on Perturbation of (Essentially) Selfadjoin Operators.
%J Mathematische Zeitschrift
%D 1971
%P 276-280
%V 119
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZ_1971__119_171498/
%F MZ_1971__119_171498