@article{01120243,
title = {Descendants in heap ordered trees or a triumph of computer algebra.},
journal = {The Electronic Journal of Combinatorics [electronic only]},
volume = {3},
year = {1996},
zbl = {0885.05004},
language = {en},
url = {http://dml.mathdoc.fr/item/01120243}
}
Prodinger, Helmut. Descendants in heap ordered trees or a triumph of computer algebra.. The Electronic Journal of Combinatorics [electronic only], Tome 3 (1996) . http://gdmltest.u-ga.fr/item/01120243/