@book{PPN589112414, title = {Planches Tome 2}, series = {GDML\_Books}, publisher = {Bachelier}, address = {Paris}, year = {1850}, language = {fr}, url = {http://dml.mathdoc.fr/item/PPN589112414} }
Leroy, Charles F. Planches Tome 2. GDML_Books (1850), http://gdmltest.u-ga.fr/item/PPN589112414/