%0 Journal Article %A Takateru Okayasu %A Jan Stochel %A Yasunori Ueda %T On a binary relation between normal operators %J Studia Mathematica %D 2011 %P 247-264 %V 204 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm204-3-4/ %R 10.4064/sm204-3-4 %G en %F 10_4064_sm204_3_4