%0 Journal Article %A Yasushi Mizusawa %T On the maximal unramified pro-2-extension of $\mathbb {Z}_2$-extensions of certain real quadratic fields II %J Acta Arithmetica %D 2005 %P 93-107 %V 119 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/aa119-1-7/ %R 10.4064/aa119-1-7 %G en %F 10_4064_aa119_1_7