@article{Grohe_2007,
    Author = {Grohe, Martin},
    File = {p1-grohe (0) - a - a - j.pdf},
    ISSN = {0004-5411},
    Journal = {Journal of the ACM},
    Month = {Mar},
    Number = {1},
    Pages = {1--es},
    Publisher = {Association for Computing Machinery (ACM)},
    Title = {The complexity of homomorphism and constraint satisfaction problems seen from the other side},
    URL = {http://dx.doi.org/10.1145/1206035.1206036},
    Volume = {54},
    Year = {2007},
    bdsk-url-1 = {http://dx.doi.org/10.1145/1206035.1206036},
    date-added = {2019-07-26 11:19:31 +0200},
    date-modified = {2019-07-26 11:19:31 +0200},
    doi = {10.1145/1206035.1206036}
}

@article{Grohe_2007, Author = {Grohe, Martin}, File = {p1-grohe (0) - a - a - j.pdf}, ISSN = {0004-5411}, Journal = {Journal of the ACM}, Month = {Mar}, Number = {1}, Pages = {1--es}, Publisher = {Association for Computing Machinery (ACM)}, Title = {The complexity of homomorphism and constraint satisfaction problems seen from the other side}, URL = {http://dx.doi.org/10.1145/1206035.1206036}, Volume = {54}, Year = {2007}, bdsk-url-1 = {http://dx.doi.org/10.1145/1206035.1206036}, date-added = {2019-07-26 11:19:31 +0200}, date-modified = {2019-07-26 11:19:31 +0200}, doi = {10.1145/1206035.1206036} }