@article{NAM_1865_2_4__496_0,
     author = {Poudra},
     title = {Propri\'et\'es du t\'etra\`edre polaire},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {496--498},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {2e s{\'e}rie, 4},
     year = {1865},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1865_2_4__496_0/}
}