%0 Journal Article %A Paulo Ribenboim %T Fermat's equation for matrices or quaternions over $q$-adic fields %J Acta Arithmetica %D 2004 %P 241-250 %V 113 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa113-3-2/ %R 10.4064/aa113-3-2 %G en %F 10_4064_aa113_3_2