TY  - JOUR
AU  - A. B. Vasil'eva
AU  - M. A. Petrova
TI  - Periodic solutions of singularly perturbed equations of elliptic type
JO  - Differencialʹnye uravneniâ
PY  - 1985
SP  - 1013
EP  - 1020
VL  - 21
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DE_1985_21_6_a12/
LA  - ru
ID  - DE_1985_21_6_a12
ER  -