TY  - JOUR
AU  - L. N. Labunets
TI  - Approximation of periodic functions by partial sums of Fourier series, for classes that are defined by a~polyharmonic operator
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1973
SP  - 56
EP  - 67
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1973_3_a8/
LA  - ru
ID  - IVM_1973_3_a8
ER  -