The companion curves of gilles personne de roberval.
@article{1782, title = {The companion curves of gilles personne de roberval}, journal = {CUBO, A Mathematical Journal}, volume = {4}, year = {2002}, language = {en}, url = {http://dml.mathdoc.fr/item/1782} }
Hughes, Barnabas. The companion curves of gilles personne de roberval. CUBO, A Mathematical Journal, Tome 4 (2002) . http://gdmltest.u-ga.fr/item/1782/