@article{10_1017_S001708950000149X,
     author = {Jr, C. S. Johnson},
     title = {Quasi-multiplicative maps on {Baer} semigroups},
     journal = {Glasgow mathematical journal},
     pages = {107--110},
     year = {1972},
     volume = {13},
     number = {2},
     doi = {10.1017/S001708950000149X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S001708950000149X/}
}