%0 Journal Article %A Harold Brown %T An application of Zassenhaus' unit theorem %J Acta Arithmetica %D 1972 %P 297-298 %V 20 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-20-3-297-298/ %R 10.4064/aa-20-3-297-298 %G de %F 10_4064_aa_20_3_297_298