@article{BAG_1978__7_138144,
     author = {M. Stern},
     title = {On perspectivities in incidence geometries of grade n},
     journal = {Beitr\"age zur Algebra und Geometrie},
     pages = {13--20},
     publisher = {mathdoc},
     volume = {7},
     year = {1978},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BAG_1978__7_138144/}
}