TY  - JOUR
AU  - V. A. Mikhailets
TI  - On the nature of the spectrum of self-adjoint extensions of operators admitting separation of variables
JO  - Matematičeskie zametki
PY  - 1974
SP  - 577
EP  - 584
VL  - 16
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1974_16_4_a9/
LA  - ru
ID  - MZM_1974_16_4_a9
ER  -