@article{JAC_2002__15_1_a0,
     author = {Lampe, Kristen A.},
     title = {A counting formula for labeled, rooted forests},
     journal = {Journal of Algebraic Combinatorics},
     pages = {71--97},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {2002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2002__15_1_a0/}
}