TY  - JOUR
AU  - È. M. Saak
TI  - An estimate of the eigenvalues of an elliptic differential operator of divergence form for domains close to an ellipsoid
JO  - Doklady Akademii Nauk
PY  - 1975
SP  - 543
EP  - 545
VL  - 224
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1975_224_3_a11/
LA  - ru
ID  - DAN_1975_224_3_a11
ER  -