%0 Journal Article %A Hasegawa, Kei %T Essential Commutants of Semicrossed Products %J Canadian mathematical bulletin %D 2015 %P 91-104 %V 58 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-2014-057-x/ %R 10.4153/CMB-2014-057-x %F 10_4153_CMB_2014_057_x