%0 Journal Article %A Miklós Bóna %T Surprising symmetries in objects counted by Catalan numbers %J The electronic journal of combinatorics %D 2012 %V 19 %N 1 %U http://geodesic.mathdoc.fr/articles/10.37236/2060/ %R 10.37236/2060 %F 10_37236_2060