@article{ASENS_1959_3_76_1_1_0,
     author = {Piccard, Sophie},
     title = {Structure des groupes libres},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {1--58},
     publisher = {Elsevier},
     volume = {3e s{\'e}rie, 76},
     number = {1},
     year = {1959},
     doi = {10.24033/asens.1076},
     mrnumber = {21 #4969},
     zbl = {0092.01901},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/asens.1076/}
}