@article{NAM_1914_4_14__534_1,
     author = {Lemaire, J.},
     title = {Sur les normales \`a une quadrique},
     journal = {Nouvelles annales de math\'ematiques : journal des candidats aux \'ecoles polytechnique et normale},
     pages = {534--535},
     publisher = {Carilian-Goeury et Vor Dalmont},
     volume = {4e s{\'e}rie, 14},
     year = {1914},
     language = {fr},
     url = {http://www.numdam.org/item/NAM_1914_4_14__534_1/}
}