%0 Journal Article %A Isaacs, Godfrey L. %T Fractional Derivatives as Inverses %J Canadian journal of mathematics %D 1989 %P 178-192 %V 41 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1989-009-0/ %R 10.4153/CJM-1989-009-0 %F 10_4153_CJM_1989_009_0