@article{Kozen_2000,
    doi = {10.1145/343369.343378},
    url = {https://doi.org/10.1145%2F343369.343378},
    year = {2000},
    month = {jul},
    publisher = {Association for Computing Machinery ({ACM})},
    volume = {1},
    number = {1},
    pages = {60--76},
    author = {Dexter Kozen},
    title = {On Hoare logic and Kleene algebra with tests},
    journal = {{ACM} Transactions on Computational Logic}
}

@article{Kozen_2000, doi = {10.1145/343369.343378}, url = {https://doi.org/10.1145%2F343369.343378}, year = {2000}, month = {jul}, publisher = {Association for Computing Machinery ({ACM})}, volume = {1}, number = {1}, pages = {60--76}, author = {Dexter Kozen}, title = {On Hoare logic and Kleene algebra with tests}, journal = {{ACM} Transactions on Computational Logic} }