@article{NAM_1861_1_20__436_0,
     author = {Darboux},
     title = {Seconde solution de la question 503},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {436--438},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {1e s{\'e}rie, 20},
     year = {1861},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1861_1_20__436_0/}
}