@article{NAM_1848_1_7__103_0,
     author = {Lafonge, Em.},
     title = {Solution de la question 172},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {103--105},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {1e s{\'e}rie, 7},
     year = {1848},
     language = {fr},
     url = {http://archive.numdam.org/item/NAM_1848_1_7__103_0/}
}