@article{MAN_1959__139_160745,
     author = {N.J. ROTHMAN},
     title = {Embedding of {Topological} {Semigroups.}},
     journal = {Mathematische Annalen},
     pages = {197--203},
     publisher = {mathdoc},
     volume = {139},
     year = {1959},
     zbl = {0099.01803},
     url = {http://geodesic.mathdoc.fr/item/MAN_1959__139_160745/}
}