%0 Journal Article %A Heerema, N. %A Morrison, T. %T On Derivations Induced by p-Adic Fields %J Canadian journal of mathematics %D 1981 %P 840-856 %V 33 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1981-065-4/ %R 10.4153/CJM-1981-065-4 %F 10_4153_CJM_1981_065_4