@article{1028990020,
author = {Harary, Frank},
title = {Note on the P\'olya and Otter formulas for enumerating trees.},
journal = {Michigan Math. J.},
volume = {3},
number = {2},
year = {1955},
pages = { 109-112},
language = {en},
url = {http://dml.mathdoc.fr/item/1028990020}
}
Harary, Frank. Note on the Pólya and Otter formulas for enumerating trees.. Michigan Math. J., Tome 3 (1955) no. 2, pp. 109-112. http://gdmltest.u-ga.fr/item/1028990020/