@article{10_4153_CMB_1970_097_x,
     author = {Burns, R. G.},
     title = {Central {Idempotents} in {Group} {Rings}},
     journal = {Canadian mathematical bulletin},
     pages = {527--528},
     year = {1970},
     volume = {13},
     number = {4},
     doi = {10.4153/CMB-1970-097-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1970-097-x/}
}