@article{10_4064_cm109_1_6,
     author = {Robert F. Tichy and Volker Ziegler},
     title = {Units generating the ring of integers of
 complex cubic fields},
     journal = {Colloquium Mathematicum},
     pages = {71--83},
     publisher = {mathdoc},
     volume = {109},
     number = {1},
     year = {2007},
     doi = {10.4064/cm109-1-6},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm109-1-6/}
}