@article{MZ_1968__105_170980,
     author = {Christoph Hering},
     title = {\"Uber projektive {Ebenen} vom {Lenz-Typ} {III.}},
     journal = {Mathematische Zeitschrift},
     pages = {219--225},
     publisher = {mathdoc},
     volume = {105},
     year = {1968},
     zbl = {0167.18801},
     url = {http://geodesic.mathdoc.fr/item/MZ_1968__105_170980/}
}