@article{SD_1955-1956__9__A17_0,
     author = {Maclane, Saunders},
     title = {Quelques th\'eor\`emes et probl\`emes sur le groupe des extensions des groupes ab\'eliens},
     journal = {S\'eminaire Albert Ch\^atelet et Paul Dubreil},
     note = {talk:23},
     pages = {1--12},
     year = {1955-1956},
     publisher = {Secr\'etariat math\'ematique},
     volume = {9},
     language = {fr},
     url = {https://www.numdam.org/item/SD_1955-1956__9__A17_0/}
}