TY  - JOUR
AU  - B. D. Boyanov
TI  - Characterization and existence of optimal quadrature formulas for a class of differentiable functions
JO  - Doklady Akademii Nauk
PY  - 1977
SP  - 1233
EP  - 1236
VL  - 232
IS  - 6
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1977_232_6_a0/
LA  - ru
ID  - DAN_1977_232_6_a0
ER  -