@inproceedings{Bul_n_2019,
    doi = {10.1145/3313276.3316300},
    url = {https://doi.org/10.1145%2F3313276.3316300},
    year = {2019},
    month = {jun},
    publisher = {{ACM}},
    author = {Jakub Bul{\'{\i}}n and Andrei Krokhin and Jakub Opr{\v{s}}al},
    title = {Algebraic approach to promise constraint satisfaction},
    booktitle = {Proceedings of the 51st Annual {ACM} {SIGACT} Symposium on Theory of Computing}
}

@inproceedings{Bul_n_2019, doi = {10.1145/3313276.3316300}, url = {https://doi.org/10.1145%2F3313276.3316300}, year = {2019}, month = {jun}, publisher = {{ACM}}, author = {Jakub Bul{\'{\i}}n and Andrei Krokhin and Jakub Opr{\v{s}}al}, title = {Algebraic approach to promise constraint satisfaction}, booktitle = {Proceedings of the 51st Annual {ACM} {SIGACT} Symposium on Theory of Computing} }