@article{JRAM_1985__356_152702,
     author = {Robert F. Coleman},
     title = {On an {Archimedian} characterization of the circular units.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {161--173},
     publisher = {mathdoc},
     volume = {356},
     year = {1985},
     zbl = {0548.12003},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1985__356_152702/}
}