%0 Journal Article %A Dragomir, S.S. %T Ostrowski’s type inequalities for complex functions defined on unit circle with applications for unitary operators in Hilbert spaces %J Archivum mathematicum %D 2015 %P 233-254 %V 51 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.5817/AM2015-4-233/ %R 10.5817/AM2015-4-233 %G en %F 10_5817_AM2015_4_233