@article{Fülöp_Vágvölgyi_1988, title={On ranges of compositions of deterministic root-to-frontier tree transformations}, volume={8}, url={https://cyber.bibl.u-szeged.hu/index.php/actcybern/article/view/3339}, number={3}, journal={Acta Cybernetica}, author={Fülöp, Zoltán and Vágvölgyi, Sándor}, year={1988}, month={Jan.}, pages={259-266} }