@article{ASENS_1924_3_41__145_0,
     author = {Chittenden, E. W.},
     title = {Sur les ensembles abstraits (extrait d'une lettre \`a {M.} {Frechet} avril 1922)},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {145--146},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 41},
     year = {1924},
     doi = {10.24033/asens.757},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/asens.757/}
}