%0 Journal Article
%A Yu. G. Shondin
%T Quantum-mechanical models in~$R_n$ associated with extensions of the energy operator in a~Pontryagin space
%J Teoretičeskaâ i matematičeskaâ fizika
%D 1988
%P 331-344
%V 74
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/TMF_1988_74_3_a1/
%G ru
%F TMF_1988_74_3_a1