@article{NAM_1863_2_2__311_0,
     author = {Cornu, A.},
     title = {Caustiques. {Centre} de jonction},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {311--317},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {2e s{\'e}rie, 2},
     year = {1863},
     language = {fr},
     url = {http://archive.numdam.org/item/NAM_1863_2_2__311_0/}
}