%0 Journal Article %A Redondo, María Julia %T α-Derivations %J Canadian mathematical bulletin %D 1995 %P 481-489 %V 38 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1995-070-2/ %R 10.4153/CMB-1995-070-2 %F 10_4153_CMB_1995_070_2