@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/