%0 Journal Article %A Jörgen Löfström %T On Certain Interpolation Spaces Related to Generalized Semi-Groups. %J Mathematica Scandinavica %D 1965 %P 41-54 %V 16 %I mathdoc %U http://geodesic.mathdoc.fr/item/MS2_1965__16_165908/ %F MS2_1965__16_165908