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    • Combinatorial representations 

      Cameron, PJ; Gadouleau, M; Riis, S (2013-04)
    • Guessing Games on Triangle-free Graphs 

      Cameron, PJ; Dang, AN; Riis, S
      The guessing game introduced by Riis is a variant of the "guessing your own hats" game and can be played on any simple directed graph G on n vertices. For each digraph G, it is proved that there exists a unique guessing ...