@article{MZ_1958__70_169759,
     author = {Karl Heinrich Hofmann},
     title = {Topologische {Loops.}},
     journal = {Mathematische Zeitschrift},
     pages = {13--37},
     year = {1958},
     volume = {70},
     zbl = {0095.02701},
     url = {http://geodesic.mathdoc.fr/item/MZ_1958__70_169759/}
}