%0 Journal Article %A Jacob Beard %A Robert Mcconnel %T Matrix field extensions %J Acta Arithmetica %D 1982 %P 213-221 %V 41 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa-41-3-213-221/ %R 10.4064/aa-41-3-213-221 %G en %F 10_4064_aa_41_3_213_221