%0 Journal Article %A Roberts, Leslie G. %T Higher Derivations and the Jordan Canonical Form of the Companion Matrix %J Canadian mathematical bulletin %D 1972 %P 143-144 %V 15 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1972-027-6/ %R 10.4153/CMB-1972-027-6 %F 10_4153_CMB_1972_027_6