@article{PPN589772627+DMDLOG_0005, title = {Einleitung.}, booktitle = {Die Planimetrie Band 2, Theil 1}, series = {GDML\_Books}, publisher = {Hahn}, year = {1862}, pages = {1}, url = {http://dml.mathdoc.fr/item/PPN589772627+DMDLOG_0005} }
(éd.). Einleitung., dans Die Planimetrie Band 2, Theil 1, GDML_Books, (1862), p. 1. http://gdmltest.u-ga.fr/item/PPN589772627+DMDLOG_0005/