@article{MAN_1966__164_161393,
     author = {B. HUPPERT},
     title = {Zur {Gasch\"utzschen} {Theorie} der {Formationen.}},
     journal = {Mathematische Annalen},
     pages = {133--141},
     publisher = {mathdoc},
     volume = {164},
     year = {1966},
     zbl = {0136.28503},
     url = {http://geodesic.mathdoc.fr/item/MAN_1966__164_161393/}
}