@article{PPN517627655+dmdlog70, title = {129. Die logischen Apobasen.}, booktitle = {Das Weltsystem Theil 2}, series = {GDML\_Books}, year = {1896}, pages = {280}, url = {http://dml.mathdoc.fr/item/PPN517627655+dmdlog70} }
(éd.). 129. Die logischen Apobasen., dans Das Weltsystem Theil 2, GDML_Books, (1896), p. 280. http://gdmltest.u-ga.fr/item/PPN517627655+dmdlog70/