TY  - JOUR
AU  - N. N. Pustovoitov
TI  - Estimates of the~best approximations of periodic functions by trigonometric polynomials in terms of averaged differences and the~multidimensional Jackson's theorem
JO  - Sbornik. Mathematics
PY  - 1997
SP  - 1507
EP  - 1520
VL  - 188
IS  - 10
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1997_188_10_a3/
LA  - en
ID  - SM_1997_188_10_a3
ER  -