@inproceedings{Kreutzer_2000,
    doi = {10.1145/335168.335214},
    url = {https://doi.org/10.1145%2F335168.335214},
    year = {2000},
    publisher = {{ACM} Press},
    author = {Stephan Kreutzer},
    title = {Fixed-point query languages for linear constraint databases},
    booktitle = {Proceedings of the nineteenth {ACM} {SIGMOD}-{SIGACT}-{SIGART} symposium on Principles of database systems  - {PODS} {\textquotesingle}00}
}

@inproceedings{Kreutzer_2000, doi = {10.1145/335168.335214}, url = {https://doi.org/10.1145%2F335168.335214}, year = {2000}, publisher = {{ACM} Press}, author = {Stephan Kreutzer}, title = {Fixed-point query languages for linear constraint databases}, booktitle = {Proceedings of the nineteenth {ACM} {SIGMOD}-{SIGACT}-{SIGART} symposium on Principles of database systems - {PODS} {\textquotesingle}00} }