@article{David_2012,
    doi = {10.1145/2338626.2338632},
    url = {https://doi.org/10.1145%2F2338626.2338632},
    year = {2012},
    month = {aug},
    publisher = {Association for Computing Machinery ({ACM})},
    volume = {37},
    number = {3},
    pages = {1--28},
    author = {Claire David and Leonid Libkin and Tony Tan},
    title = {Efficient reasoning about data trees via integer linear programming},
    journal = {{ACM} Transactions on Database Systems}
}

@article{David_2012, doi = {10.1145/2338626.2338632}, url = {https://doi.org/10.1145%2F2338626.2338632}, year = {2012}, month = {aug}, publisher = {Association for Computing Machinery ({ACM})}, volume = {37}, number = {3}, pages = {1--28}, author = {Claire David and Leonid Libkin and Tony Tan}, title = {Efficient reasoning about data trees via integer linear programming}, journal = {{ACM} Transactions on Database Systems} }