@article{STNG_1975-1977__5__A3_0,
     author = {Gillard, Roland},
     title = {Sur le groupe des classes des extensions ab\'eliennes r\'eelles},
     journal = {S\'eminaire de th\'eorie des nombres de Grenoble},
     note = {talk:3},
     pages = {1--8},
     publisher = {Institut des Math\'ematiques Pures - Universit\'e Scientifique et M\'edicale de Grenoble},
     volume = {5},
     year = {1975-1977},
     language = {fr},
     url = {http://archive.numdam.org/item/STNG_1975-1977__5__A3_0/}
}