@inproceedings{Garey_1976,
    doi = {10.1145/800113.803626},
    url = {https://doi.org/10.1145%2F800113.803626},
    year = {1976},
    publisher = {{ACM} Press},
    author = {M. R. Garey and R. L. Graham and D. S. Johnson},
    title = {Some {NP}-complete geometric problems},
    booktitle = {Proceedings of the eighth annual {ACM} symposium on Theory of computing  - {STOC} {\textquotesingle}76}
}

@inproceedings{Garey_1976, doi = {10.1145/800113.803626}, url = {https://doi.org/10.1145%2F800113.803626}, year = {1976}, publisher = {{ACM} Press}, author = {M. R. Garey and R. L. Graham and D. S. Johnson}, title = {Some {NP}-complete geometric problems}, booktitle = {Proceedings of the eighth annual {ACM} symposium on Theory of computing - {STOC} {\textquotesingle}76} }