TY - JOUR AU - S. P. Singh AU - A. S. Ranadive TI - On the degree of approximation by positive linear operators using the B-summability method JO - Revista colombiana de matematicas PY - 1991 SP - 1 EP - 10 VL - 25 IS - 1-4 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RCM_1991__25_1-4_181844/ ID - RCM_1991__25_1-4_181844 ER -