@article{BSMF_1960__88__217_0,
     author = {Charles, Bernard},
     title = {\'Etude sur les sous-groupes d'un groupe ab\'elien},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {217--227},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {88},
     year = {1960},
     doi = {10.24033/bsmf.1550},
     mrnumber = {22 #8055},
     zbl = {0102.26505},
     language = {fr},
     url = {http://archive.numdam.org/articles/10.24033/bsmf.1550/}
}