@article{SF_1977__15_134246,
     author = {D. Poguntke},
     title = {Well-bounded semigroups in connected groups.},
     journal = {Semigroup forum},
     pages = {159--168},
     publisher = {mathdoc},
     volume = {15},
     year = {1977},
     zbl = {0393.22001},
     url = {http://geodesic.mathdoc.fr/item/SF_1977__15_134246/}
}