@article{JMPA_1942_9_21__111_0,
     author = {Delens, Paul},
     title = {Sur certaines relations entre t\'etra\`edres et quadriques},
     journal = {Journal de Math\'ematiques Pures et Appliqu\'ees},
     pages = {111--121},
     publisher = {Gauthier-Villars},
     volume = {9e s{\'e}rie, 21},
     year = {1942},
     zbl = {0027.08203},
     language = {fr},
     url = {http://archive.numdam.org/item/JMPA_1942_9_21__111_0/}
}