@article{JRAM_1970__243_151033,
     author = {Reiner K\"uhnau},
     title = {Der {Modul} von {Kurven-} und {Fl\"achenscharen} und r\"aumliche {Felder} in inhomogenen {Medien.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {184--191},
     publisher = {mathdoc},
     volume = {243},
     year = {1970},
     zbl = {0204.09301},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1970__243_151033/}
}