TY  - JOUR
AU  - G. A. Mirzoev
TI  - Quasiregular differential operators of fourth order
JO  - Doklady Akademii Nauk
PY  - 1980
SP  - 550
EP  - 553
VL  - 251
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1980_251_3_a8/
LA  - ru
ID  - DAN_1980_251_3_a8
ER  -