@article{SF_1995__51_1_135426,
     author = {P.M. Higgins},
     title = {Embedding semigroups in semibands of depth two.},
     journal = {Semigroup forum},
     pages = {395--396},
     publisher = {mathdoc},
     volume = {51},
     number = {1},
     year = {1995},
     zbl = {0838.20060},
     url = {http://geodesic.mathdoc.fr/item/SF_1995__51_1_135426/}
}