@article{PPN58470691X+DMDLOG_0004, title = {B. Trigonometrie.}, booktitle = {Geometrie und Trigonometrie Abth. 2}, series = {GDML\_Books}, publisher = {Lampart}, address = {Augsburg}, year = {1851}, pages = {46}, url = {http://dml.mathdoc.fr/item/PPN58470691X+DMDLOG_0004} }
(éd.). B. Trigonometrie., dans Geometrie und Trigonometrie Abth. 2, GDML_Books, (1851), p. 46. http://gdmltest.u-ga.fr/item/PPN58470691X+DMDLOG_0004/