@article{COMIM_2005__13_1_a7,
     author = {Steuding, J\"orn},
     title = {Upper bounds for the density of universality. {II}},
     journal = {Communications in Mathematics},
     pages = {73--82},
     publisher = {mathdoc},
     volume = {13},
     number = {1},
     year = {2005},
     mrnumber = {2290420},
     zbl = {1251.11059},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/COMIM_2005__13_1_a7/}
}