@inbook{400467,
title = {Zweiter Theil. Elementarlehre. \S 46},
booktitle = {Wissenschaftlehre},
series = {GDML\_Books},
publisher = {J.E. v Seidel},
address = {Sulzbach},
year = {1837},
pages = {213-214},
url = {http://dml.mathdoc.fr/item/400467}
}
(éd.). Zweiter Theil. Elementarlehre. §46, dans Wissenschaftlehre, GDML_Books, (1837), pp. 213-214. http://gdmltest.u-ga.fr/item/400467/