@article{JRAM_1973__0262_0263_151359,
     author = {Ulrich Orbanz},
     title = {H\"ohere {Derivationen} und {Regularit\"at.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {194--204},
     publisher = {mathdoc},
     volume = {0262_0263},
     year = {1973},
     zbl = {0309.13003},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1973__0262_0263_151359/}
}