%0 Journal Article %A Urban Larsson %A Johan Wästlund %T From heaps of matches to the limits of computability %J The electronic journal of combinatorics %D 2013 %V 20 %N 3 %U http://geodesic.mathdoc.fr/articles/10.37236/2244/ %R 10.37236/2244 %F 10_37236_2244