%0 Journal Article %A T. Harju %A J. Karhumäki %T On the defect theorem and simpliflability. %J Semigroup forum %D 1986 %P 199-218 %V 33 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1986__33_134804/ %F SF_1986__33_134804