@incollection{MSMF_1974__37__115_0,
     author = {Kaplan, Pierre},
     title = {Sur le 2-groupe des classes des corps quadratiques},
     booktitle = {Journ\'ees arithm\'etiques (Grenoble, 1973)},
     series = {M\'emoires de la Soci\'et\'e Math\'ematique de France},
     pages = {115--116},
     publisher = {Soci\'et\'e math\'ematique de France},
     number = {37},
     year = {1974},
     doi = {10.24033/msmf.137},
     mrnumber = {53 #2896},
     zbl = {0307.12003},
     url = {http://archive.numdam.org/articles/10.24033/msmf.137/}
}