@article{NAM_1860_1_19__420_0,
     author = {Dupain, J. -Ch. and Poitrasson and Siacchi},
     title = {Solution de la question 535},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {420--421},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {1e s{\'e}rie, 19},
     year = {1860},
     language = {fr},
     url = {http://archive.numdam.org/item/NAM_1860_1_19__420_0/}
}