@article{PPN587689498+DMDLOG_0020, title = {Cap. XI. Die perspectivische Projection.}, booktitle = {Geometrie des Raumes Theil 2}, series = {GDML\_Books}, publisher = {Teubner}, address = {Leipzig}, year = {1874}, pages = {257}, url = {http://dml.mathdoc.fr/item/PPN587689498+DMDLOG_0020} }
(éd.). Cap. XI. Die perspectivische Projection., dans Geometrie des Raumes Theil 2, GDML_Books, (1874), p. 257. http://gdmltest.u-ga.fr/item/PPN587689498+DMDLOG_0020/