@book{MSMF_1978__57__1_0,
     author = {Velu, Jacques},
     title = {Courbes elliptiques munies d{\textquoteright}un sous-groupe $\mathbb {Z}/n\mathbb {Z}\times \mu _n$},
     series = {M\'emoires de la Soci\'et\'e Math\'ematique de France},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {57},
     year = {1978},
     doi = {10.24033/msmf.241},
     zbl = {0433.14029},
     mrnumber = {507751},
     language = {fr},
     url = {http://www.numdam.org/item/MSMF_1978__57__1_0/}
}