@article{10_4064_aa119_1_7,
     author = {Yasushi Mizusawa},
     title = {On the maximal unramified pro-2-extension of $\mathbb {Z}_2$-extensions
 of certain real quadratic fields {II}},
     journal = {Acta Arithmetica},
     pages = {93--107},
     publisher = {mathdoc},
     volume = {119},
     number = {1},
     year = {2005},
     doi = {10.4064/aa119-1-7},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa119-1-7/}
}