@article{MAN_1977__228_162991,
     author = {R.A. Bowshell and P. Schultz},
     title = {Unital {Rings} whose {Additive} {Endomorphisms} {Commute.}},
     journal = {Mathematische Annalen},
     pages = {197--214},
     publisher = {mathdoc},
     volume = {228},
     year = {1977},
     zbl = {0336.20040},
     url = {http://geodesic.mathdoc.fr/item/MAN_1977__228_162991/}
}