@article{JRAM_1976__0283_0284_151731,
     author = {P.R. M\"uller-R\"omer},
     title = {Kontrahierende {Erweiterungen} und kontrahierbare {Gruppen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {238--264},
     publisher = {mathdoc},
     volume = {0283_0284},
     year = {1976},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1976__0283_0284_151731/}
}