@incollection{F_l_p_2009,
    doi = {10.1007/978-3-642-01492-5_9},
    url = {https://doi.org/10.1007%2F978-3-642-01492-5_9},
    year = {2009},
    publisher = {Springer Berlin Heidelberg},
    pages = {313--403},
    author = {Zolt{\'{a}}n Fülöp and Heiko Vogler},
    title = {Weighted Tree Automata and Tree Transducers},
    booktitle = {Monographs in Theoretical Computer Science}
}

@incollection{F_l_p_2009, doi = {10.1007/978-3-642-01492-5_9}, url = {https://doi.org/10.1007%2F978-3-642-01492-5_9}, year = {2009}, publisher = {Springer Berlin Heidelberg}, pages = {313--403}, author = {Zolt{\'{a}}n Fülöp and Heiko Vogler}, title = {Weighted Tree Automata and Tree Transducers}, booktitle = {Monographs in Theoretical Computer Science} }