TY - JOUR AU - Yu. G. Shondin TI - Quantum-mechanical models in~$R_n$ associated with extensions of the energy operator in a~Pontryagin space JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1988 SP - 331 EP - 344 VL - 74 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_1988_74_3_a1/ LA - ru ID - TMF_1988_74_3_a1 ER -