%0 Journal Article %A Seunghyun Seo %T A combinatorial proof of {P}ostnikov's identity and a generalized enumeration of labeled trees %J The electronic journal of combinatorics %D 2004 %V 11 %N 2 %U http://geodesic.mathdoc.fr/articles/10.37236/1890/ %R 10.37236/1890 %F 10_37236_1890