@article{01667684,
title = {Enumeration problems of trees. (Abz\"ahlprobleme bei B\"aumen.)},
journal = {S\'eminaire Lotharingien de Combinatoire [electronic only]},
volume = {8},
year = {1983},
zbl = {0978.05531},
language = {en},
url = {http://dml.mathdoc.fr/item/01667684}
}
Prodinger, Helmut. Enumeration problems of trees. (Abzählprobleme bei Bäumen.). Séminaire Lotharingien de Combinatoire [electronic only], Tome 8 (1983) . http://gdmltest.u-ga.fr/item/01667684/