@article{CMUC_1985_26_2_a13,
     author = {\'Ulehla, Josef},
     title = {On racial insufficiency: {White} messengers cannot simulate coloured ones},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {323--325},
     year = {1985},
     volume = {26},
     number = {2},
     mrnumber = {803930},
     zbl = {0568.68033},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1985_26_2_a13/}
}