@article{MZ_1996__223_3_174907,
     author = {Wolfgang Schwarz and Hans-G\"unter Zimmer},
     title = {Stickelberger ideal and signature of circular units.},
     journal = {Mathematische Zeitschrift},
     pages = {1--12},
     publisher = {mathdoc},
     volume = {223},
     number = {3},
     year = {1996},
     zbl = {0863.11069},
     url = {http://geodesic.mathdoc.fr/item/MZ_1996__223_3_174907/}
}