@article{Gottlob_2014,
    doi = {10.1016/j.artint.2014.04.004},
    url = {https://doi.org/10.1016%2Fj.artint.2014.04.004},
    year = {2014},
    month = {aug},
    publisher = {Elsevier {BV}},
    volume = {213},
    pages = {42--59},
    author = {Georg Gottlob and Stanislav Kikot and Roman Kontchakov and Vladimir Podolskii and Thomas Schwentick and Michael Zakharyaschev},
    title = {The price of query rewriting in ontology-based data access},
    journal = {Artificial Intelligence}
}

@article{Gottlob_2014, doi = {10.1016/j.artint.2014.04.004}, url = {https://doi.org/10.1016%2Fj.artint.2014.04.004}, year = {2014}, month = {aug}, publisher = {Elsevier {BV}}, volume = {213}, pages = {42--59}, author = {Georg Gottlob and Stanislav Kikot and Roman Kontchakov and Vladimir Podolskii and Thomas Schwentick and Michael Zakharyaschev}, title = {The price of query rewriting in ontology-based data access}, journal = {Artificial Intelligence} }