@article{JRAM_1976__0283_0284_151737,
     author = {Pierre Kaplan},
     title = {Sur le 2-groupe des classes d'id\'eaux des corps quadratiques.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {313--363},
     publisher = {mathdoc},
     volume = {0283_0284},
     year = {1976},
     zbl = {0337.12003},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1976__0283_0284_151737/}
}