@inproceedings{Ben_Or_1983,
    doi = {10.1145/800061.808735},
    url = {https://doi.org/10.1145%2F800061.808735},
    year = {1983},
    publisher = {{ACM} Press},
    author = {Michael Ben-Or},
    title = {Lower bounds for algebraic computation trees},
    booktitle = {Proceedings of the fifteenth annual {ACM} symposium on Theory of computing  - {STOC} {\textquotesingle}83}
}

@inproceedings{Ben_Or_1983, doi = {10.1145/800061.808735}, url = {https://doi.org/10.1145%2F800061.808735}, year = {1983}, publisher = {{ACM} Press}, author = {Michael Ben-Or}, title = {Lower bounds for algebraic computation trees}, booktitle = {Proceedings of the fifteenth annual {ACM} symposium on Theory of computing - {STOC} {\textquotesingle}83} }