@article{Droste_2006,
    doi = {10.1016/j.tcs.2006.08.025},
    url = {https://doi.org/10.1016%2Fj.tcs.2006.08.025},
    year = {2006},
    month = {nov},
    publisher = {Elsevier {BV}},
    volume = {366},
    number = {3},
    pages = {228--247},
    author = {Manfred Droste and Heiko Vogler},
    title = {Weighted tree automata and weighted logics},
    journal = {Theoretical Computer Science}
}

@article{Droste_2006, doi = {10.1016/j.tcs.2006.08.025}, url = {https://doi.org/10.1016%2Fj.tcs.2006.08.025}, year = {2006}, month = {nov}, publisher = {Elsevier {BV}}, volume = {366}, number = {3}, pages = {228--247}, author = {Manfred Droste and Heiko Vogler}, title = {Weighted tree automata and weighted logics}, journal = {Theoretical Computer Science} }