@article{10_4064_fm179_2_4,
     author = {Karel Dekimpe},
     title = {Units in group rings of crystallographic groups},
     journal = {Fundamenta Mathematicae},
     pages = {169--178},
     publisher = {mathdoc},
     volume = {179},
     number = {2},
     year = {2003},
     doi = {10.4064/fm179-2-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm179-2-4/}
}