TY  - JOUR
AU  - G. G. Kazaryan
TI  - A numerical characteristic of linear differential operators with
JO  - Doklady Akademii Nauk
PY  - 1985
SP  - 1068
EP  - 1072
VL  - 283
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1985_283_5_a10/
LA  - ru
ID  - DAN_1985_283_5_a10
ER  -