TY  - JOUR
AU  - M. I. Vishik
AU  - L. Lusternik
TI  - On elliptical equations containing small parameters in the terms with higher derivatives
JO  - Doklady Akademii Nauk
PY  - 1957
SP  - 734
EP  - 737
VL  - 113
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1957_113_4_a2/
LA  - ru
ID  - DAN_1957_113_4_a2
ER  -