@article{Plaisted_1984,
    doi = {10.1016/0304-3975(84)90130-0},
    url = {https://doi.org/10.1016%2F0304-3975%2884%2990130-0},
    year = {1984},
    publisher = {Elsevier {BV}},
    volume = {31},
    number = {1-2},
    pages = {125--138},
    author = {David A. Plaisted},
    title = {New {NP}-hard and {NP}-complete polynomial and integer divisibility problems},
    journal = {Theoretical Computer Science}
}

@article{Plaisted_1984, doi = {10.1016/0304-3975(84)90130-0}, url = {https://doi.org/10.1016%2F0304-3975%2884%2990130-0}, year = {1984}, publisher = {Elsevier {BV}}, volume = {31}, number = {1-2}, pages = {125--138}, author = {David A. Plaisted}, title = {New {NP}-hard and {NP}-complete polynomial and integer divisibility problems}, journal = {Theoretical Computer Science} }