@article{Schimpf198525,
    Author = {Schimpf, Karl M. and Gallier, Jean H.},
    File = {Tree pushdown automata - Schimpf, Gallier (0) (0) - a - a - r.pdf},
    ISSN = {0022-0000},
    Journal = {Journal of Computer and System Sciences},
    Keywords = {tree-pushdown automata},
    Number = {1},
    Pages = {25 - 40},
    Title = {Tree pushdown automata},
    URL = {http://www.sciencedirect.com/science/article/pii/0022000085900029},
    Volume = {30},
    Year = {1985},
    bdsk-url-1 = {http://www.sciencedirect.com/science/article/pii/0022000085900029},
    bdsk-url-2 = {http://dx.doi.org/10.1016/0022-0000(85)90002-9},
    date-added = {2012-10-15 09:56:41 +0000},
    date-modified = {2012-10-26 08:57:17 +0000},
    doi = {10.1016/0022-0000(85)90002-9}
}

@article{Schimpf198525, Author = {Schimpf, Karl M. and Gallier, Jean H.}, File = {Tree pushdown automata - Schimpf, Gallier (0) (0) - a - a - r.pdf}, ISSN = {0022-0000}, Journal = {Journal of Computer and System Sciences}, Keywords = {tree-pushdown automata}, Number = {1}, Pages = {25 - 40}, Title = {Tree pushdown automata}, URL = {http://www.sciencedirect.com/science/article/pii/0022000085900029}, Volume = {30}, Year = {1985}, bdsk-url-1 = {http://www.sciencedirect.com/science/article/pii/0022000085900029}, bdsk-url-2 = {http://dx.doi.org/10.1016/0022-0000(85)90002-9}, date-added = {2012-10-15 09:56:41 +0000}, date-modified = {2012-10-26 08:57:17 +0000}, doi = {10.1016/0022-0000(85)90002-9} }