@article{RCM_2015_49_1_a3,
     author = {Silvestru Sever Dragomir},
     title = {Gruss {Type} {Inequalities} for {Complex} {Functions} {Dened} on {Unit} {Circle} with {Applications} for {Unitary} {Operators} in {Hilbert} {Spaces}},
     journal = {Revista colombiana de matematicas},
     pages = {77--94},
     publisher = {mathdoc},
     volume = {49},
     number = {1},
     year = {2015},
     url = {http://geodesic.mathdoc.fr/item/RCM_2015_49_1_a3/}
}