@article{ASENS_1950_3_67__15_0,
     author = {L\'evy, Paul},
     title = {Axiome de {Zermelo} et nombres transfinis},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {15--49},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 67},
     year = {1950},
     doi = {10.24033/asens.976},
     mrnumber = {12,72b},
     zbl = {0037.00401},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/asens.976/}
}