@article{Immerman_1986,
    doi = {10.1016/s0019-9958(86)80029-8},
    url = {https://doi.org/10.1016%2Fs0019-9958%2886%2980029-8},
    year = {1986},
    month = {jan},
    publisher = {Elsevier {BV}},
    volume = {68},
    number = {1-3},
    pages = {86--104},
    author = {Neil Immerman},
    title = {Relational queries computable in polynomial time},
    journal = {Information and Control}
}

@article{Immerman_1986, doi = {10.1016/s0019-9958(86)80029-8}, url = {https://doi.org/10.1016%2Fs0019-9958%2886%2980029-8}, year = {1986}, month = {jan}, publisher = {Elsevier {BV}}, volume = {68}, number = {1-3}, pages = {86--104}, author = {Neil Immerman}, title = {Relational queries computable in polynomial time}, journal = {Information and Control} }