@article{SF_1976__13_134206,
     author = {U. Knauer},
     title = {A note on {Baer} monoids.},
     journal = {Semigroup forum},
     pages = {143--148},
     publisher = {mathdoc},
     volume = {13},
     year = {1976},
     zbl = {0354.20042},
     url = {http://geodesic.mathdoc.fr/item/SF_1976__13_134206/}
}