@article{10_4064_cm_80_1_97_105,
     author = {Ulrich Albrecht and H. Goeters},
     title = {Strong ${\cal S}$-groups},
     journal = {Colloquium Mathematicum},
     pages = {97--105},
     year = {1999},
     volume = {80},
     number = {1},
     doi = {10.4064/cm-80-1-97-105},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-80-1-97-105/}
}