@article{NAM_1844_1_3__391_0,
     author = {Ritt, Georges},
     title = {Solution du probl\`eme 40},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {391--393},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {1e s{\'e}rie, 3},
     year = {1844},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1844_1_3__391_0/}
}