TY  - JOUR
AU  - N. E. Lushpai
AU  - I. L. Zaichenko
TI  - Extremal numerical integration formulas for classes of differentiable periodic functions
JO  - Informatics and Automation
PY  - 1987
SP  - 152
EP  - 154
VL  - 180
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TRSPY_1987_180_a89/
LA  - ru
ID  - TRSPY_1987_180_a89
ER  -