TY - JOUR TI - An optimal 3-point quadrature formula of closed type and error bounds JO - Revista colombiana de matematicas PY - 2008 SP - 209 EP - 220 VL - 42 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RCM_2008_42_2_a1/ ID - RCM_2008_42_2_a1 ER -