@article{NAM_1861_1_20__301_0,
     author = {Blanch\'e-Arrault and Cornu and Cuenoud},
     title = {Solution de la question 569},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {301--302},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {1e s{\'e}rie, 20},
     year = {1861},
     language = {fr},
     url = {http://archive.numdam.org/item/NAM_1861_1_20__301_0/}
}