@article{JRAM_1989__400_153168,
     author = {Kay Wingberg},
     title = {On {Galois} groups of p-closed algebraic number fields with restricted ramification.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {185--202},
     publisher = {mathdoc},
     volume = {400},
     year = {1989},
     zbl = {0715.11065},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1989__400_153168/}
}