TY  - JOUR
AU  - N. N. Zaderei
AU  - A. I. Stepanets
TI  - Approximation of Fourier sums on classes of periodic functions that are defined by polyharmonic operators
JO  - Matematičeskie zametki
PY  - 1980
SP  - 569
EP  - 581
VL  - 27
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1980_27_4_a7/
LA  - ru
ID  - MZM_1980_27_4_a7
ER  -