@article{NAM_1894_3_13__215_1,
     author = {Auric},
     title = {Note sur le probl\`eme du billard circulaire},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {215--218},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {3e s{\'e}rie, 13},
     year = {1894},
     language = {fr},
     url = {http://archive.numdam.org/item/NAM_1894_3_13__215_1/}
}