@article{MZ_1986__193_173801,
     author = {Paul Monsky},
     title = {Class {Numbers} in {Z....-Extensions.} {III.}},
     journal = {Mathematische Zeitschrift},
     pages = {491--514},
     publisher = {mathdoc},
     volume = {193},
     year = {1986},
     zbl = {0596.12005},
     url = {http://geodesic.mathdoc.fr/item/MZ_1986__193_173801/}
}