TY - JOUR AU - Silvestru Sever Dragomir TI - Gruss Type Inequalities for Complex Functions Dened on Unit Circle with Applications for Unitary Operators in Hilbert Spaces JO - Revista colombiana de matematicas PY - 2015 SP - 77 EP - 94 VL - 49 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RCM_2015_49_1_a3/ ID - RCM_2015_49_1_a3 ER -