TY - JOUR AU - A. S. Loginov TI - Best approximations of continuous functions by piecewise monotone functions JO - Izvestiya. Mathematics PY - 1974 SP - 991 EP - 1008 VL - 8 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM2_1974_8_5_a2/ LA - en ID - IM2_1974_8_5_a2 ER -