@article{02161258,
title = {A combinatorial proof of Postnikov's identity and a generalized enumeration of labeled trees.},
journal = {The Electronic Journal of Combinatorics [electronic only]},
volume = {12},
year = {2005},
zbl = {1082.05008},
language = {en},
url = {http://dml.mathdoc.fr/item/02161258}
}
Seo, Seunghyun. A combinatorial proof of Postnikov's identity and a generalized enumeration of labeled trees.. The Electronic Journal of Combinatorics [electronic only], Tome 12 (2005) . http://gdmltest.u-ga.fr/item/02161258/