@article{10_4064_fm_85_2_147_163,
     author = {Kenneth Magill},
     title = {Semigroups which admit few embeddings},
     journal = {Fundamenta Mathematicae},
     pages = {147--163},
     publisher = {mathdoc},
     volume = {85},
     number = {2},
     year = {1974},
     doi = {10.4064/fm-85-2-147-163},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-85-2-147-163/}
}