@article{Leibniz2008, author = {Gottfried Wilhelm Freiherr von Leibniz}, title = {Historia observationis Cometae 1702. Ex J. Henr. Hoffmanni, Ephemeridibus Anni 1703. excerpta}, url = {http://edoc.bbaw.de/oa/series/rexTocQAESgM/PDF/28txwRB1xwLkg.pdf}, year = {2008}, }