@article{NAM_1862_2_1__321_0,
     author = {Sacchi},
     title = {Question 493},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {321--322},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {2e s{\'e}rie, 1},
     year = {1862},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1862_2_1__321_0/}
}