@article{MAN_1956__132_160515,
     author = {W. Klingenberg},
     title = {Projektive {Geometrien} mit {Homomorphismus.}},
     journal = {Mathematische Annalen},
     pages = {180--200},
     year = {1956},
     volume = {132},
     zbl = {0073.36404},
     url = {http://geodesic.mathdoc.fr/item/MAN_1956__132_160515/}
}