@article{Jones1977277,
    Author = {Jones, Neil D. and Landweber, Lawrence H. and Lien, Y. Edmund},
    File = {Complexity of some problems in Petri nets - Jones, Landweber, Lien (0) (0) - a - a - a.pdf},
    ISSN = {0304-3975},
    Journal = {Theoretical Computer Science},
    Keywords = {Petri nets},
    Number = {3},
    Pages = {277 - 299},
    Title = {Complexity of some problems in Petri nets},
    URL = {http://www.sciencedirect.com/science/article/pii/0304397577900147},
    Volume = {4},
    Year = {1977},
    bdsk-url-1 = {http://www.sciencedirect.com/science/article/pii/0304397577900147},
    bdsk-url-2 = {http://dx.doi.org/10.1016/0304-3975(77)90014-7},
    date-added = {2012-12-29 14:38:07 +0000},
    date-modified = {2012-12-29 14:38:21 +0000},
    doi = {10.1016/0304-3975(77)90014-7}
}

@article{Jones1977277, Author = {Jones, Neil D. and Landweber, Lawrence H. and Lien, Y. Edmund}, File = {Complexity of some problems in Petri nets - Jones, Landweber, Lien (0) (0) - a - a - a.pdf}, ISSN = {0304-3975}, Journal = {Theoretical Computer Science}, Keywords = {Petri nets}, Number = {3}, Pages = {277 - 299}, Title = {Complexity of some problems in Petri nets}, URL = {http://www.sciencedirect.com/science/article/pii/0304397577900147}, Volume = {4}, Year = {1977}, bdsk-url-1 = {http://www.sciencedirect.com/science/article/pii/0304397577900147}, bdsk-url-2 = {http://dx.doi.org/10.1016/0304-3975(77)90014-7}, date-added = {2012-12-29 14:38:07 +0000}, date-modified = {2012-12-29 14:38:21 +0000}, doi = {10.1016/0304-3975(77)90014-7} }