@article{Tarjan_1979,
    doi = {10.1016/0022-0000(79)90042-4},
    url = {https://doi.org/10.1016%2F0022-0000%2879%2990042-4},
    year = {1979},
    month = {apr},
    publisher = {Elsevier {BV}},
    volume = {18},
    number = {2},
    pages = {110--127},
    author = {Robert Endre Tarjan},
    title = {A class of algorithms which require nonlinear time to maintain disjoint sets},
    journal = {Journal of Computer and System Sciences}
}

@article{Tarjan_1979, doi = {10.1016/0022-0000(79)90042-4}, url = {https://doi.org/10.1016%2F0022-0000%2879%2990042-4}, year = {1979}, month = {apr}, publisher = {Elsevier {BV}}, volume = {18}, number = {2}, pages = {110--127}, author = {Robert Endre Tarjan}, title = {A class of algorithms which require nonlinear time to maintain disjoint sets}, journal = {Journal of Computer and System Sciences} }