@article{AIF_1983__33_4_1_0,
     author = {Gras, Georges},
     title = {Sur les ${\bf Z}_2$-extensions d{\textquoteright}un corps quadratique imaginaire},
     journal = {Annales de l'Institut Fourier},
     pages = {1--18},
     publisher = {Institut Fourier},
     address = {Grenoble},
     volume = {33},
     number = {4},
     year = {1983},
     doi = {10.5802/aif.939},
     mrnumber = {85b:11091},
     zbl = {0501.12016},
     language = {fr},
     url = {http://www.numdam.org/articles/10.5802/aif.939/}
}