TY - JOUR AU - P.Parvanov TI - Weighted Approximation by a Class of Bernstein-Type Operators JO - Mathematica balkanica PY - 2011 SP - 31 VL - 25 IS - 1-2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MABA_2011_25_1-2_a2/ ID - MABA_2011_25_1-2_a2 ER -