@article{MOMA_1978__86_177894,
     author = {Richard Koch},
     title = {Parallelogrammnetze.},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {265--284},
     publisher = {mathdoc},
     volume = {86},
     year = {1978},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1978__86_177894/}
}