%0 Journal Article %A Qin Yue %T Class groups under relative quadratic extensions %J Acta Arithmetica %D 2011 %P 399-414 %V 150 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa150-4-5/ %R 10.4064/aa150-4-5 %G en %F 10_4064_aa150_4_5