@article{Muller198551,
    Author = {Muller, David E. and Schupp, Paul E.},
    File = {The theory of ends, pushdown automata, and second-order logic - Muller, Schupp (0) (0) - a - a - c.pdf},
    ISSN = {0304-3975},
    Journal = {Theoretical Computer Science},
    Keywords = {pushdown automata and model checking and MSO},
    Number = {0},
    Pages = {51 - 75},
    Title = {The theory of ends, pushdown automata, and second-order logic},
    URL = {http://www.sciencedirect.com/science/article/pii/0304397585900878},
    Volume = {37},
    Year = {1985},
    bdsk-url-1 = {http://www.sciencedirect.com/science/article/pii/0304397585900878},
    bdsk-url-2 = {http://dx.doi.org/10.1016/0304-3975(85)90087-8},
    date-added = {2012-03-06 18:09:04 +0100},
    date-modified = {2012-04-05 13:21:05 +0000},
    doi = {10.1016/0304-3975(85)90087-8}
}

@article{Muller198551, Author = {Muller, David E. and Schupp, Paul E.}, File = {The theory of ends, pushdown automata, and second-order logic - Muller, Schupp (0) (0) - a - a - c.pdf}, ISSN = {0304-3975}, Journal = {Theoretical Computer Science}, Keywords = {pushdown automata and model checking and MSO}, Number = {0}, Pages = {51 - 75}, Title = {The theory of ends, pushdown automata, and second-order logic}, URL = {http://www.sciencedirect.com/science/article/pii/0304397585900878}, Volume = {37}, Year = {1985}, bdsk-url-1 = {http://www.sciencedirect.com/science/article/pii/0304397585900878}, bdsk-url-2 = {http://dx.doi.org/10.1016/0304-3975(85)90087-8}, date-added = {2012-03-06 18:09:04 +0100}, date-modified = {2012-04-05 13:21:05 +0000}, doi = {10.1016/0304-3975(85)90087-8} }