TY  - JOUR
AU  - Nguyen Thi Thien Hoa
TI  - Rolle's theorem for differential operators, and some extremal
JO  - Doklady Akademii Nauk
PY  - 1987
SP  - 1313
EP  - 1318
VL  - 295
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1987_295_6_a6/
LA  - ru
ID  - DAN_1987_295_6_a6
ER  -