@article{NAM_1864_2_3__143_1,
     author = {de Virieu},
     title = {D\'emonstration de la seconde \'egalit\'e de la question 681},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {143--144},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {2e s{\'e}rie, 3},
     year = {1864},
     language = {fr},
     url = {http://archive.numdam.org/item/NAM_1864_2_3__143_1/}
}