@article{KFOURY199383,
    Author = {Kfoury, A. J. and Tiuryn, J. and Urzyczyn, P.},
    File = {The Undecidability of the Semi-unification Problem -- 1-s2.0-S0890540183710035-main - a - e.pdf},
    ISSN = {0890-5401},
    Journal = {Information and Computation},
    Number = {1},
    Pages = {83--101},
    Title = {The Undecidability of the Semi-unification Problem},
    URL = {http://www.sciencedirect.com/science/article/pii/S0890540183710035},
    Volume = {102},
    Year = {1993},
    bdsk-url-1 = {http://www.sciencedirect.com/science/article/pii/S0890540183710035},
    bdsk-url-2 = {https://doi.org/10.1006/inco.1993.1003},
    date-added = {2020-12-16 22:35:26 +0100},
    date-modified = {2020-12-16 22:35:26 +0100},
    doi = {10.1006/inco.1993.1003}
}

@article{KFOURY199383, Author = {Kfoury, A. J. and Tiuryn, J. and Urzyczyn, P.}, File = {The Undecidability of the Semi-unification Problem -- 1-s2.0-S0890540183710035-main - a - e.pdf}, ISSN = {0890-5401}, Journal = {Information and Computation}, Number = {1}, Pages = {83--101}, Title = {The Undecidability of the Semi-unification Problem}, URL = {http://www.sciencedirect.com/science/article/pii/S0890540183710035}, Volume = {102}, Year = {1993}, bdsk-url-1 = {http://www.sciencedirect.com/science/article/pii/S0890540183710035}, bdsk-url-2 = {https://doi.org/10.1006/inco.1993.1003}, date-added = {2020-12-16 22:35:26 +0100}, date-modified = {2020-12-16 22:35:26 +0100}, doi = {10.1006/inco.1993.1003} }