@article{Szeider_2011,
    doi = {10.1145/1877714.1877718},
    url = {https://doi.org/10.1145%2F1877714.1877718},
    year = {2011},
    month = {jan},
    publisher = {Association for Computing Machinery ({ACM})},
    volume = {12},
    number = {2},
    pages = {1--21},
    author = {Stefan Szeider},
    title = {Monadic second order logic on graphs with local cardinality constraints},
    journal = {{ACM} Transactions on Computational Logic}
}

@article{Szeider_2011, doi = {10.1145/1877714.1877718}, url = {https://doi.org/10.1145%2F1877714.1877718}, year = {2011}, month = {jan}, publisher = {Association for Computing Machinery ({ACM})}, volume = {12}, number = {2}, pages = {1--21}, author = {Stefan Szeider}, title = {Monadic second order logic on graphs with local cardinality constraints}, journal = {{ACM} Transactions on Computational Logic} }