@article{NAM_1867_2_6__408_0,
     author = {Giard, Alfred},
     title = {Sur les volumes trap\'ezo{\"\i}daux (voir t. {VII,} p. 241)},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {408--410},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {2e s{\'e}rie, 6},
     year = {1867},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1867_2_6__408_0/}
}