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"(2+2)-free posets, ascent sequences and pattern avoiding permutations."
Mireille Bousquet-Mélou et al. (2010)
- Mireille Bousquet-Mélou, Anders Claesson, Mark Dukes, Sergey Kitaev:
(2+2)-free posets, ascent sequences and pattern avoiding permutations. J. Comb. Theory A 117(7): 884-909 (2010)
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