TY  - JOUR
AU  - E. P. Dolzhenko
AU  - E. A. Sevast'yanov
TI  - On the dependence of properties of functions on their degree of approximation by polynomials
JO  - Izvestiya. Mathematics 
PY  - 1978
SP  - 255
EP  - 288
VL  - 12
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/IM2_1978_12_2_a4/
LA  - en
ID  - IM2_1978_12_2_a4
ER  -