@article{Tarjan_1981,
    doi = {10.1145/322261.322272},
    url = {https://doi.org/10.1145%2F322261.322272},
    year = {1981},
    month = {jul},
    publisher = {Association for Computing Machinery ({ACM})},
    volume = {28},
    number = {3},
    pages = {577--593},
    author = {Robert Endre Tarjan},
    title = {A Unified Approach to Path Problems},
    journal = {Journal of the {ACM}}
}

@article{Tarjan_1981, doi = {10.1145/322261.322272}, url = {https://doi.org/10.1145%2F322261.322272}, year = {1981}, month = {jul}, publisher = {Association for Computing Machinery ({ACM})}, volume = {28}, number = {3}, pages = {577--593}, author = {Robert Endre Tarjan}, title = {A Unified Approach to Path Problems}, journal = {Journal of the {ACM}} }