TY  - JOUR
AU  - N. S. Nadirashvili
TI  - A lemma on the inner derivative, and the uniqueness of the solution of the second boundary value problem for second order elliptic equations
JO  - Doklady Akademii Nauk
PY  - 1981
SP  - 804
EP  - 808
VL  - 261
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1981_261_4_a7/
LA  - ru
ID  - DAN_1981_261_4_a7
ER  -