@article{MZ_1939__44_168814,
     author = {H. und S Graf and R.,, R., Sauer},
     title = {Fastrhombische {Kurvennetze} und {Vierecksnetze}},
     journal = {Mathematische Zeitschrift},
     pages = {362--386},
     publisher = {mathdoc},
     volume = {44},
     year = {1939},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1939__44_168814/}
}