@article{SD_1972-1973__26__A4_0,
     author = {Gu\'erindon, Jean},
     title = {Groupes de {Picard} et s\'eries formelles},
     journal = {S\'eminaire Albert Ch\^atelet et Paul Dubreil},
     note = {talk:4},
     pages = {1--6},
     year = {1972-1973},
     publisher = {Secr\'etariat math\'ematique},
     volume = {26},
     mrnumber = {396562},
     zbl = {0328.13002},
     language = {fr},
     url = {https://www.numdam.org/item/SD_1972-1973__26__A4_0/}
}