@inproceedings{Kfoury:1990:USP:100216.100279,
    Address = {New York, NY, USA},
    Author = {Kfoury, A. J. and Tiuryn, J. and Urzyczyn, P.},
    BookTitle = {Proceedings of the twenty-second annual ACM symposium on Theory of computing},
    File = {The undecidability of the semi-unification problem - Kfoury, Tiuryn, Urzyczyn (0) (0) - a - a - e.pdf},
    ISBN = {0-89791-361-2},
    Location = {Baltimore, Maryland, USA},
    Pages = {468--476},
    Publisher = {ACM},
    Series = {STOC '90},
    Title = {The undecidability of the semi-unification problem},
    URL = {http://doi.acm.org/10.1145/100216.100279},
    Year = {1990},
    acmid = {100279},
    bdsk-url-1 = {http://doi.acm.org/10.1145/100216.100279},
    bdsk-url-2 = {http://dx.doi.org/10.1145/100216.100279},
    date-added = {2013-07-04 15:05:41 +0000},
    date-modified = {2013-07-04 15:05:41 +0000},
    numpages = {9},
    doi = {10.1145/100216.100279}
}

@inproceedings{Kfoury:1990:USP:100216.100279, Address = {New York, NY, USA}, Author = {Kfoury, A. J. and Tiuryn, J. and Urzyczyn, P.}, BookTitle = {Proceedings of the twenty-second annual ACM symposium on Theory of computing}, File = {The undecidability of the semi-unification problem - Kfoury, Tiuryn, Urzyczyn (0) (0) - a - a - e.pdf}, ISBN = {0-89791-361-2}, Location = {Baltimore, Maryland, USA}, Pages = {468--476}, Publisher = {ACM}, Series = {STOC '90}, Title = {The undecidability of the semi-unification problem}, URL = {http://doi.acm.org/10.1145/100216.100279}, Year = {1990}, acmid = {100279}, bdsk-url-1 = {http://doi.acm.org/10.1145/100216.100279}, bdsk-url-2 = {http://dx.doi.org/10.1145/100216.100279}, date-added = {2013-07-04 15:05:41 +0000}, date-modified = {2013-07-04 15:05:41 +0000}, numpages = {9}, doi = {10.1145/100216.100279} }