@article{Barto_2014,
    doi = {10.1145/2556646},
    url = {https://doi.org/10.1145%2F2556646},
    year = {2014},
    month = {jan},
    publisher = {Association for Computing Machinery ({ACM})},
    volume = {61},
    number = {1},
    pages = {1--19},
    author = {Libor Barto and Marcin Kozik},
    title = {Constraint Satisfaction Problems Solvable by Local Consistency Methods},
    journal = {Journal of the {ACM}}
}

@article{Barto_2014, doi = {10.1145/2556646}, url = {https://doi.org/10.1145%2F2556646}, year = {2014}, month = {jan}, publisher = {Association for Computing Machinery ({ACM})}, volume = {61}, number = {1}, pages = {1--19}, author = {Libor Barto and Marcin Kozik}, title = {Constraint Satisfaction Problems Solvable by Local Consistency Methods}, journal = {Journal of the {ACM}} }