@article{Dawar_2004,
    doi = {10.1145/976706.976710},
    url = {https://doi.org/10.1145%2F976706.976710},
    year = {2004},
    month = {apr},
    publisher = {Association for Computing Machinery ({ACM})},
    volume = {5},
    number = {2},
    pages = {282--315},
    author = {Anuj Dawar and Erich Grädel and Stephan Kreutzer},
    title = {Inflationary fixed points in modal logic},
    journal = {{ACM} Transactions on Computational Logic}
}

@article{Dawar_2004, doi = {10.1145/976706.976710}, url = {https://doi.org/10.1145%2F976706.976710}, year = {2004}, month = {apr}, publisher = {Association for Computing Machinery ({ACM})}, volume = {5}, number = {2}, pages = {282--315}, author = {Anuj Dawar and Erich Grädel and Stephan Kreutzer}, title = {Inflationary fixed points in modal logic}, journal = {{ACM} Transactions on Computational Logic} }