@article{JMPA_1946_9_25__241_0,
     author = {Gambier, Bertrand},
     title = {Cercles focaux d'une conique},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {241--255},
     volume = {9e s{\'e}rie, 25},
     year = {1946},
     mrnumber = {23541},
     zbl = {0061.31410},
     language = {fr},
     url = {http://www.numdam.org/item/JMPA_1946_9_25__241_0/}
}