@article{Bellantoni_1992,
    doi = {10.1007/bf01201998},
    url = {https://doi.org/10.1007%2Fbf01201998},
    year = {1992},
    month = {jun},
    publisher = {Springer Science and Business Media {LLC}},
    volume = {2},
    number = {2},
    pages = {97--110},
    author = {Spephen Bellantoni and Stephen Cook},
    title = {A new recursion-theoretic characterization of the polytime functions},
    journal = {Computational Complexity}
}

@article{Bellantoni_1992, doi = {10.1007/bf01201998}, url = {https://doi.org/10.1007%2Fbf01201998}, year = {1992}, month = {jun}, publisher = {Springer Science and Business Media {LLC}}, volume = {2}, number = {2}, pages = {97--110}, author = {Spephen Bellantoni and Stephen Cook}, title = {A new recursion-theoretic characterization of the polytime functions}, journal = {Computational Complexity} }