@article{PPN517627655+dmdlog101, title = {IX. Die absolute Welt.}, booktitle = {Das Weltsystem Theil 2}, series = {GDML\_Books}, year = {1896}, pages = {415}, url = {http://dml.mathdoc.fr/item/PPN517627655+dmdlog101} }
(éd.). IX. Die absolute Welt., dans Das Weltsystem Theil 2, GDML_Books, (1896), p. 415. http://gdmltest.u-ga.fr/item/PPN517627655+dmdlog101/