@article{NAM_1843_1_2__511_0,
     author = {Rispal},
     title = {D\'etermination des tangentes aux courbes polaires},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {511--514},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {1e s{\'e}rie, 2},
     year = {1843},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1843_1_2__511_0/}
}