TY  - JOUR
AU  - I. V. Skrypnik
TI  - On a topological characteristic of general nonlinear elliptic operators
JO  - Doklady Akademii Nauk
PY  - 1978
SP  - 538
EP  - 541
VL  - 239
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1978_239_3_a9/
LA  - ru
ID  - DAN_1978_239_3_a9
ER  -