@article{Papadimitriou_1981,
    doi = {10.1145/322276.322287},
    url = {https://doi.org/10.1145%2F322276.322287},
    year = {1981},
    month = {oct},
    publisher = {Association for Computing Machinery ({ACM})},
    volume = {28},
    number = {4},
    pages = {765--768},
    author = {Christos H. Papadimitriou},
    title = {On the complexity of integer programming},
    journal = {Journal of the {ACM}}
}

@article{Papadimitriou_1981, doi = {10.1145/322276.322287}, url = {https://doi.org/10.1145%2F322276.322287}, year = {1981}, month = {oct}, publisher = {Association for Computing Machinery ({ACM})}, volume = {28}, number = {4}, pages = {765--768}, author = {Christos H. Papadimitriou}, title = {On the complexity of integer programming}, journal = {Journal of the {ACM}} }