@article{10_4064_aa135_2_5,
     author = {Kuniaki Horie and Mitsuko Horie},
     title = {The narrow class groups of some $\mathbb Z_p$-extensions
 over the rationals},
     journal = {Acta Arithmetica},
     pages = {159--180},
     publisher = {mathdoc},
     volume = {135},
     number = {2},
     year = {2008},
     doi = {10.4064/aa135-2-5},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa135-2-5/}
}