@article{10_1017_S0017089501030166,
     author = {Danchev, Peter},
     title = {Normed units in abelian group rings},
     journal = {Glasgow mathematical journal},
     pages = {365--373},
     year = {2001},
     volume = {43},
     number = {3},
     doi = {10.1017/S0017089501030166},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089501030166/}
}