@article{10_4153_CJM_1972_120_1,
     author = {Hughes, Ian and Wei, Chou-Hsiang},
     title = {Group {Rings} with {Only} {Trivial} {Units} of {Finite} {Order}},
     journal = {Canadian journal of mathematics},
     pages = {1137--1138},
     year = {1972},
     volume = {24},
     number = {6},
     doi = {10.4153/CJM-1972-120-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1972-120-1/}
}