@article{SF_1995__51_1_135408,
     author = {E. Hotzel},
     title = {Maximality properties of some subsemigroups of {Baer-Levi} semigroups.},
     journal = {Semigroup forum},
     pages = {153--190},
     publisher = {mathdoc},
     volume = {51},
     number = {1},
     year = {1995},
     zbl = {0834.20064},
     url = {http://geodesic.mathdoc.fr/item/SF_1995__51_1_135408/}
}