@article{10_4153_CJM_1970_032_3,
     author = {Coleman, D. B.},
     title = {On {Group} {Rings}},
     journal = {Canadian journal of mathematics},
     pages = {249--254},
     year = {1970},
     volume = {22},
     number = {2},
     doi = {10.4153/CJM-1970-032-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1970-032-3/}
}