@article{10_4153_CMB_1961_024_4,
     author = {Banaschewski, Bernhard},
     title = {On {Proving} the {Absence} of {Zero-Divisors} for {Semi-Group} {Rings}},
     journal = {Canadian mathematical bulletin},
     pages = {225--231},
     year = {1961},
     volume = {4},
     number = {3},
     doi = {10.4153/CMB-1961-024-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1961-024-4/}
}