@inproceedings{Hrube__2010,
    doi = {10.1145/1806689.1806781},
    url = {https://doi.org/10.1145%2F1806689.1806781},
    year = {2010},
    month = {jun},
    publisher = {{ACM}},
    author = {Pavel Hrube{\v{s}} and Avi Wigderson and Amir Yehudayoff},
    title = {Non-commutative circuits and the sum-of-squares problem},
    booktitle = {Proceedings of the forty-second {ACM} symposium on Theory of computing}
}

@inproceedings{Hrube__2010, doi = {10.1145/1806689.1806781}, url = {https://doi.org/10.1145%2F1806689.1806781}, year = {2010}, month = {jun}, publisher = {{ACM}}, author = {Pavel Hrube{\v{s}} and Avi Wigderson and Amir Yehudayoff}, title = {Non-commutative circuits and the sum-of-squares problem}, booktitle = {Proceedings of the forty-second {ACM} symposium on Theory of computing} }