%0 Journal Article %A Marcin Mazur %A Stephen V. Ullom %T Galois module structure of units in real biquadratic number fields %J Acta Arithmetica %D 2004 %P 105-124 %V 111 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa111-2-1/ %R 10.4064/aa111-2-1 %G en %F 10_4064_aa111_2_1