TY  - JOUR
AU  - A. M. Ermolaev
TI  - Perturbation theory for the expansion coefficients of two-electron wave function
JO  - Doklady Akademii Nauk
PY  - 1967
SP  - 1302
EP  - 1305
VL  - 177
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1967_177_6_a13/
LA  - ru
ID  - DAN_1967_177_6_a13
ER  -