@article{Fortune1980111,
    Author = {Fortune, Steven and Hopcroft, John and Wyllie, James},
    File = {The directed subgraph homeomorphism problem - Fortune, Hopcroft, Wyllie (0) (0) - a - a - z.pdf},
    ISSN = {0304-3975},
    Journal = {Theoretical Computer Science},
    Number = {2},
    Pages = {111 - 121},
    Title = {The directed subgraph homeomorphism problem},
    URL = {http://www.sciencedirect.com/science/article/pii/0304397580900092},
    Volume = {10},
    Year = {1980},
    bdsk-url-1 = {http://www.sciencedirect.com/science/article/pii/0304397580900092},
    bdsk-url-2 = {http://dx.doi.org/10.1016/0304-3975(80)90009-2},
    date-added = {2014-04-22 15:29:53 +0000},
    date-modified = {2014-04-22 15:29:53 +0000},
    doi = {10.1016/0304-3975(80)90009-2}
}

@article{Fortune1980111, Author = {Fortune, Steven and Hopcroft, John and Wyllie, James}, File = {The directed subgraph homeomorphism problem - Fortune, Hopcroft, Wyllie (0) (0) - a - a - z.pdf}, ISSN = {0304-3975}, Journal = {Theoretical Computer Science}, Number = {2}, Pages = {111 - 121}, Title = {The directed subgraph homeomorphism problem}, URL = {http://www.sciencedirect.com/science/article/pii/0304397580900092}, Volume = {10}, Year = {1980}, bdsk-url-1 = {http://www.sciencedirect.com/science/article/pii/0304397580900092}, bdsk-url-2 = {http://dx.doi.org/10.1016/0304-3975(80)90009-2}, date-added = {2014-04-22 15:29:53 +0000}, date-modified = {2014-04-22 15:29:53 +0000}, doi = {10.1016/0304-3975(80)90009-2} }