TY  - JOUR
AU  - V. I. Ivanov
TI  - Approximation in $L_p$ by polynomials in the Walsh system
JO  - Sbornik. Mathematics
PY  - 1989
SP  - 385
EP  - 402
VL  - 62
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1989_62_2_a4/
LA  - en
ID  - SM_1989_62_2_a4
ER  -