@inproceedings{Jancar_2019,
    doi = {10.1109/lics.2019.8785848},
    url = {https://doi.org/10.1109%2Flics.2019.8785848},
    year = {2019},
    month = {jun},
    publisher = {{IEEE}},
    author = {Petr Jancar and Sylvain Schmitz},
    title = {Bisimulation Equivalence of First-Order Grammars is {ACKERMANN}-Complete},
    booktitle = {2019 34th Annual {ACM}/{IEEE} Symposium on Logic in Computer Science ({LICS})}
}

@inproceedings{Jancar_2019, doi = {10.1109/lics.2019.8785848}, url = {https://doi.org/10.1109%2Flics.2019.8785848}, year = {2019}, month = {jun}, publisher = {{IEEE}}, author = {Petr Jancar and Sylvain Schmitz}, title = {Bisimulation Equivalence of First-Order Grammars is {ACKERMANN}-Complete}, booktitle = {2019 34th Annual {ACM}/{IEEE} Symposium on Logic in Computer Science ({LICS})} }