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@article{MAN_1879__15_156865, author = {Sturm}, title = {Vereinfachung des {Problems} der r\"aumlichen {Projectivit\"at}}, journal = {Mathematische Annalen}, pages = {407--423}, publisher = {mathdoc}, volume = {15}, year = {1879}, zbl = {11.0462.01}, url = {http://geodesic.mathdoc.fr/item/MAN_1879__15_156865/} }
Sturm. Vereinfachung des Problems der räumlichen Projectivität. Mathematische Annalen, Tome 15 (1879), pp. 407-423. http://geodesic.mathdoc.fr/item/MAN_1879__15_156865/