TY  - JOUR
AU  - V. A. Sadovnichy
AU  - V. V. Dubrovskii
TI  - An abstract theorem of perturbation theory, regularized trace formulas, and the zeta function of operators
JO  - Differencialʹnye uravneniâ
PY  - 1977
SP  - 1264
EP  - 1271
VL  - 13
IS  - 7
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1977_13_7_a12/
LA  - ru
ID  - DE_1977_13_7_a12
ER  -