@article{Apt:1980:PSC:357103.357110,
    Address = {New York, NY, USA},
    Author = {Apt, Krzysztof R. and Francez, Nissim and de Roever, Willem P.},
    ISSN = {0164-0925},
    Journal = {ACM Trans. Program. Lang. Syst.},
    Month = {July},
    Number = {3},
    Pages = {359--385},
    Publisher = {ACM},
    Title = {A Proof System for Communicating Sequential Processes},
    URL = {http://doi.acm.org/10.1145/357103.357110},
    Volume = {2},
    Year = {1980},
    acmid = {357110},
    bdsk-url-1 = {http://doi.acm.org/10.1145/357103.357110},
    bdsk-url-2 = {https://doi.org/10.1145/357103.357110},
    date-added = {2019-12-28 12:32:53 +0100},
    date-modified = {2019-12-28 12:32:53 +0100},
    issue_date = {July 1980},
    numpages = {27},
    doi = {10.1145/357103.357110}
}

@article{Apt:1980:PSC:357103.357110, Address = {New York, NY, USA}, Author = {Apt, Krzysztof R. and Francez, Nissim and de Roever, Willem P.}, ISSN = {0164-0925}, Journal = {ACM Trans. Program. Lang. Syst.}, Month = {July}, Number = {3}, Pages = {359--385}, Publisher = {ACM}, Title = {A Proof System for Communicating Sequential Processes}, URL = {http://doi.acm.org/10.1145/357103.357110}, Volume = {2}, Year = {1980}, acmid = {357110}, bdsk-url-1 = {http://doi.acm.org/10.1145/357103.357110}, bdsk-url-2 = {https://doi.org/10.1145/357103.357110}, date-added = {2019-12-28 12:32:53 +0100}, date-modified = {2019-12-28 12:32:53 +0100}, issue_date = {July 1980}, numpages = {27}, doi = {10.1145/357103.357110} }