Groupes abéliens discrets
Séminaire Henri Cartan, Tome 1 (1948-1949), Exposé no. 3, p. 1-5
@article{SHC_1948-1949__1__A3_0,
     author = {Cerf, Jean},
     title = {Groupes ab\'eliens discrets},
     journal = {S\'eminaire Henri Cartan},
     publisher = {Secr\'etariat math\'ematique},
     volume = {1},
     year = {1948-1949},
     note = {talk:3},
     pages = {1-5},
     language = {fr},
     url = {http://www.numdam.org/item/SHC_1948-1949__1__A3_0}
}
Cerf, J. Groupes abéliens discrets. Séminaire Henri Cartan, Tome 1 (1948-1949) Exposé no. 3, pp. 1-5. http://www.numdam.org/item/SHC_1948-1949__1__A3_0/