@article{JRAM_1973__264_151393,
     author = {Mary Powderly},
     title = {On expansions of a {Urysohn} space to a regular space.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {182--183},
     publisher = {mathdoc},
     volume = {264},
     year = {1973},
     zbl = {0267.54014},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1973__264_151393/}
}