@article{BSMF_2007__135_2_299_0,
     author = {Oukhaba, Hassan},
     title = {Indice des unit\'es elliptiques dans les $\mathbb {Z}_p$-extensions},
     journal = {Bulletin de la Soci\'et\'e Math\'ematique de France},
     pages = {299--322},
     publisher = {Soci\'et\'e math\'ematique de France},
     volume = {135},
     number = {2},
     year = {2007},
     doi = {10.24033/bsmf.2536},
     mrnumber = {2430195},
     zbl = {1231.11065},
     language = {fr},
     url = {http://www.numdam.org/articles/10.24033/bsmf.2536/}
}