@article{PPN622650963+DMDLOG_0004, title = {Planimetrie.}, booktitle = {Kongruenz Heft 1}, series = {GDML\_Books}, publisher = {Nebert}, address = {Halle}, year = {1889}, pages = {3}, url = {http://dml.mathdoc.fr/item/PPN622650963+DMDLOG_0004} }
(éd.). Planimetrie., dans Kongruenz Heft 1, GDML_Books, (1889), p. 3. http://gdmltest.u-ga.fr/item/PPN622650963+DMDLOG_0004/