@article{MM2_1986__57_155204,
     author = {Robert Gold and James R. Brink},
     title = {Class fields towers of imaginary quadratic fields.},
     journal = {Manuscripta mathematica},
     pages = {425--450},
     year = {1986},
     volume = {57},
     zbl = {0611.12009},
     url = {http://geodesic.mathdoc.fr/item/MM2_1986__57_155204/}
}