%0 Journal Article %A Zdeněk Polický %T On the group of circular units of any compositum of quadratic fields %J Acta Arithmetica %D 2009 %P 111-115 %V 139 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa139-2-2/ %R 10.4064/aa139-2-2 %G en %F 10_4064_aa139_2_2