@article{BSMF_1935__63__231_0,
     author = {Delens, Paul},
     title = {Du cercle aux coniques ; l'association isotrope},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {231--245},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {63},
     year = {1935},
     doi = {10.24033/bsmf.1235},
     zbl = {0013.31503},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.1235/}
}