@article{JRAM_1976__0283_0284_151714,
     author = {Karl Mathiak},
     title = {Schnitt und {Verbindung} in projektiven {Hjelmsleveschen} {R\"aumen.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {9--20},
     publisher = {mathdoc},
     volume = {0283_0284},
     year = {1976},
     zbl = {0327.50013},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1976__0283_0284_151714/}
}