@article{05576443,
title = {Hook length formulas for trees by Han's expansion.},
journal = {The Electronic Journal of Combinatorics [electronic only]},
volume = {16},
year = {2009},
zbl = {1180.05007},
language = {en},
url = {http://dml.mathdoc.fr/item/05576443}
}
Chen, William Y.C.; Gao, Oliver X.Q.; Guo, Peter L. Hook length formulas for trees by Han's expansion.. The Electronic Journal of Combinatorics [electronic only], Tome 16 (2009) . http://gdmltest.u-ga.fr/item/05576443/