%0 Journal Article %A Manabu Murata %T Shimura's mass formula for an orthogonal group over real quadratic fields %J Acta Arithmetica %D 2006 %P 125-148 %V 121 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa121-2-3/ %R 10.4064/aa121-2-3 %G en %F 10_4064_aa121_2_3