%0 Journal Article %A Kikumasa, Isao %T Automorphisms of a Certain Skew Polynomial Ring of Derivation Type %J Canadian journal of mathematics %D 1990 %P 949-958 %V 42 %N 6 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1990-050-0/ %R 10.4153/CJM-1990-050-0 %F 10_4153_CJM_1990_050_0