@article{Allen_1983,
    doi = {10.1145/182.358434},
    url = {https://doi.org/10.1145%2F182.358434},
    year = {1983},
    month = {nov},
    publisher = {Association for Computing Machinery ({ACM})},
    volume = {26},
    number = {11},
    pages = {832--843},
    author = {James F. Allen},
    title = {Maintaining knowledge about temporal intervals},
    journal = {Communications of the {ACM}}
}

@article{Allen_1983, doi = {10.1145/182.358434}, url = {https://doi.org/10.1145%2F182.358434}, year = {1983}, month = {nov}, publisher = {Association for Computing Machinery ({ACM})}, volume = {26}, number = {11}, pages = {832--843}, author = {James F. Allen}, title = {Maintaining knowledge about temporal intervals}, journal = {Communications of the {ACM}} }