@article{10_4064_aa119_3_4,
     author = {Bernhard Schmidt},
     title = {The field descent and class groups of $CM$-fields},
     journal = {Acta Arithmetica},
     pages = {291--306},
     publisher = {mathdoc},
     volume = {119},
     number = {3},
     year = {2005},
     doi = {10.4064/aa119-3-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/aa119-3-4/}
}