TY  - JOUR
AU  - N. Yu. Orlov
TI  - A variational approach to the determination of the energy spectrum of bound electrons
JO  - Differencialʹnye uravneniâ
PY  - 1991
SP  - 1237
EP  - 1245
VL  - 27
IS  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1991_27_7_a15/
LA  - ru
ID  - DE_1991_27_7_a15
ER  -