TY  - JOUR
AU  - A. I. Koshelev
TI  - On the differentiability of solutions of elliptical differential equations
JO  - Doklady Akademii Nauk
PY  - 1957
SP  - 806
EP  - 809
VL  - 112
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1957_112_5_a5/
LA  - ru
ID  - DAN_1957_112_5_a5
ER  -