@article{AUCMP_2011_52_2_a6,
     author = {Fla\v{s}ka, V\'aclav and Kepka, Tom\'a\v{s} and Korteleinen, Juha},
     title = {On separating sets of words. {V}},
     journal = {Acta Universitatis Carolinae. Mathematica et Physica},
     pages = {51--59},
     year = {2011},
     volume = {52},
     number = {2},
     mrnumber = {2952456},
     zbl = {1258.68107},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AUCMP_2011_52_2_a6/}
}