@chapter{DammGoerdt,
    Author = {Damm, Werner and Goerdt, Andreas},
    BookTitle = {Automata, Languages and Programming},
    File = {An automata-theoretic characterization of the OI-hierarchy - Damm, Goerdt (0) (0) - a - a - m.pdf},
    Keywords = {higher-order pushdown automata},
    Pages = {141--153},
    Series = {Lecture Notes in Computer Science},
    Title = {An automata-theoretic characterization of the OI-hierarchy},
    Volume = {140},
    Year = {1982},
    bdsk-url-1 = {http://www.springerlink.com/content/m41224175478535m/fulltext.pdf},
    bdsk-url-2 = {http://dx.doi.org/10.1007/BFb0012764},
    date-added = {2012-04-27 15:01:30 +0200},
    date-modified = {2012-04-27 13:01:51 +0000},
    doi = {10.1007/BFb0012764}
}

@chapter{DammGoerdt, Author = {Damm, Werner and Goerdt, Andreas}, BookTitle = {Automata, Languages and Programming}, File = {An automata-theoretic characterization of the OI-hierarchy - Damm, Goerdt (0) (0) - a - a - m.pdf}, Keywords = {higher-order pushdown automata}, Pages = {141--153}, Series = {Lecture Notes in Computer Science}, Title = {An automata-theoretic characterization of the OI-hierarchy}, Volume = {140}, Year = {1982}, bdsk-url-1 = {http://www.springerlink.com/content/m41224175478535m/fulltext.pdf}, bdsk-url-2 = {http://dx.doi.org/10.1007/BFb0012764}, date-added = {2012-04-27 15:01:30 +0200}, date-modified = {2012-04-27 13:01:51 +0000}, doi = {10.1007/BFb0012764} }