@article{10_4153_CJM_1976_096_3,
     author = {Bell, Howard E.},
     title = {A {Commutativity} {Condition} for {Rings}},
     journal = {Canadian journal of mathematics},
     pages = {986--991},
     year = {1976},
     volume = {28},
     number = {5},
     doi = {10.4153/CJM-1976-096-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-096-3/}
}