TY  - JOUR
AU  - Yu. A. Konyaev
TI  - On a method of studying certain problems in perturbation theory
JO  - Sbornik. Mathematics
PY  - 1995
SP  - 507
EP  - 517
VL  - 80
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1995_80_2_a12/
LA  - en
ID  - SM_1995_80_2_a12
ER  -