@article{MAN_1883__22_157085,
     author = {Rohn},
     title = {Ein {Beitrag} zur {Theorie} der biplanaren und imiplanaren {Knotenpunkte.}},
     journal = {Mathematische Annalen},
     pages = {124--144},
     publisher = {mathdoc},
     volume = {22},
     year = {1883},
     zbl = {15.0678.02},
     url = {http://geodesic.mathdoc.fr/item/MAN_1883__22_157085/}
}