TY  - JOUR
AU  - G. G. Kazaryan
TI  - Comparison of differential operators, and differential operators of constant strength
JO  - Doklady Akademii Nauk
PY  - 1973
SP  - 1272
EP  - 1275
VL  - 208
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1973_208_6_a2/
LA  - ru
ID  - DAN_1973_208_6_a2
ER  -