@article{10_4153_CMB_1968_042_0,
     author = {Bell, Howard E.},
     title = {Duo {Rings:} {Some} {Applications} to {Commutativity} {Theorems}},
     journal = {Canadian mathematical bulletin},
     pages = {375--380},
     year = {1968},
     volume = {11},
     number = {3},
     doi = {10.4153/CMB-1968-042-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1968-042-0/}
}