@article{10_37236_1253,
     author = {Helmut Prodinger},
     title = {Descendants in heap ordered trees or a triumph of computer algebra},
     journal = {The electronic journal of combinatorics},
     year = {1996},
     volume = {3},
     number = {1},
     doi = {10.37236/1253},
     zbl = {0885.05004},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1253/}
}