@article{BSMF_1935__63__231_0, author = {Delens, P. C.}, title = {Du cercle aux coniques ; l'association isotrope}, journal = {Bulletin de la Soci\'et\'e Math\'ematique de France}, volume = {63}, year = {1935}, pages = {231-245}, doi = {10.24033/bsmf.1235}, zbl = {0013.31503}, language = {fr}, url = {http://dml.mathdoc.fr/item/BSMF_1935__63__231_0} }
Delens, Paul. Du cercle aux coniques ; l'association isotrope. Bulletin de la Société Mathématique de France, Tome 63 (1935) pp. 231-245. doi : 10.24033/bsmf.1235. http://gdmltest.u-ga.fr/item/BSMF_1935__63__231_0/