TY  - JOUR
AU  - A. E. Zhizhin
TI  - On the integrability of some nonanalytic involutive systems
JO  - Doklady Akademii Nauk
PY  - 1978
SP  - 15
EP  - 18
VL  - 238
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1978_238_1_a1/
LA  - ru
ID  - DAN_1978_238_1_a1
ER  -