TY - JOUR AU - Redondo, María Julia TI - α-Derivations JO - Canadian mathematical bulletin PY - 1995 SP - 481 EP - 489 VL - 38 IS - 4 UR - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1995-070-2/ DO - 10.4153/CMB-1995-070-2 ID - 10_4153_CMB_1995_070_2 ER -