@article{10_4153_CMB_1978_083_8,
     author = {Williamson, Alan},
     title = {On the {Conjugacy} {Classes} in an {Integral} {Group} {Ring}},
     journal = {Canadian mathematical bulletin},
     pages = {491--496},
     year = {1978},
     volume = {21},
     number = {4},
     doi = {10.4153/CMB-1978-083-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1978-083-8/}
}