TY  - JOUR
AU  - V. V. Lipovik
TI  - The order of approximation in the strong sense of periodic functions of two variables by Fourier sums and by certain interpolation sums
JO  - Izvestiâ vysših učebnyh zavedenij. Matematika
PY  - 1970
SP  - 43
EP  - 49
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IVM_1970_3_a6/
LA  - ru
ID  - IVM_1970_3_a6
ER  -