@article{ASENS_1992_4_25_5_465_0,
     author = {Breen, Lawrence},
     title = {Th\'eorie de {Schreier} sup\'erieure},
     journal = {Annales scientifiques de l'\'Ecole Normale Sup\'erieure},
     pages = {465--514},
     publisher = {Elsevier},
     volume = {4e s{\'e}rie, 25},
     number = {5},
     year = {1992},
     doi = {10.24033/asens.1656},
     mrnumber = {93k:18019},
     zbl = {0795.18009},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/asens.1656/}
}