@article{NAM_1856_1_15__82_0,
     author = {Dupain, J.-Ch.},
     title = {Sur le calcul de $\pi $},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {82--86},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {1e s{\'e}rie, 15},
     year = {1856},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1856_1_15__82_0/}
}