Citations of

38. William Y.C. Chen, Oliver X.Q. Gao, and Peter L. Guo, Hook length formulas for trees by Han's expansion, Electron. J. Combin. 16 (2009) #R62.

  1. N. Eriksen, Combinatorial proofs for some forest hook length identities, preprint, 2009.

  2. Markus Kuba, A note on hook length formulas for trees, arXiv:1004.1883.

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