@article{PPN584694482+DMDLOG_0002, title = {Vorrede.}, booktitle = {Trigonometrie Th. 3}, series = {GDML\_Books}, publisher = {Zwissler}, address = {Wolfenb\"uttel}, year = {1880}, pages = {V}, url = {http://dml.mathdoc.fr/item/PPN584694482+DMDLOG_0002} }
(éd.). Vorrede., dans Trigonometrie Th. 3, GDML_Books, (1880), p. V. http://gdmltest.u-ga.fr/item/PPN584694482+DMDLOG_0002/