@inproceedings{parys:LIPIcs:2012:3394,
    Address = {Dagstuhl, Germany},
    Annote = {Keywords: pushdown graph, epsilon-contraction, pumping lemma},
    Author = {Parys, Pawel},
    BookTitle = {29th International Symposium on Theoretical Aspects of Computer Science (STACS 2012)},
    Editor = {D{\"u}rr, Christoph and Wilke, Thomas},
    File = {A Pumping Lemma for Pushdown Graphs of Any Level - Parys (0) (0) - a - a - f.pdf},
    ISBN = {978-3-939897-35-4},
    ISSN = {1868-8969},
    Keywords = {higher-order pushdown automata and higher-order recursion schemes},
    Pages = {54--65},
    Publisher = {Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik},
    Series = {Leibniz International Proceedings in Informatics (LIPIcs)},
    Title = {{A Pumping Lemma for Pushdown Graphs of Any Level}},
    URL = {http://drops.dagstuhl.de/opus/volltexte/2012/3394},
    Volume = {14},
    Year = {2012},
    bdsk-url-1 = {http://drops.dagstuhl.de/opus/volltexte/2012/3394},
    bdsk-url-2 = {http://dx.doi.org/10.4230/LIPIcs.STACS.2012.54},
    date-added = {2012-06-05 11:15:02 +0200},
    date-modified = {2012-06-05 09:15:13 +0000},
    urn = {urn:nbn:de:0030-drops-33940},
    doi = {10.4230/LIPIcs.STACS.2012.54}
}

@inproceedings{parys:LIPIcs:2012:3394, Address = {Dagstuhl, Germany}, Annote = {Keywords: pushdown graph, epsilon-contraction, pumping lemma}, Author = {Parys, Pawel}, BookTitle = {29th International Symposium on Theoretical Aspects of Computer Science (STACS 2012)}, Editor = {D{\"u}rr, Christoph and Wilke, Thomas}, File = {A Pumping Lemma for Pushdown Graphs of Any Level - Parys (0) (0) - a - a - f.pdf}, ISBN = {978-3-939897-35-4}, ISSN = {1868-8969}, Keywords = {higher-order pushdown automata and higher-order recursion schemes}, Pages = {54--65}, Publisher = {Schloss Dagstuhl--Leibniz-Zentrum fuer Informatik}, Series = {Leibniz International Proceedings in Informatics (LIPIcs)}, Title = {{A Pumping Lemma for Pushdown Graphs of Any Level}}, URL = {http://drops.dagstuhl.de/opus/volltexte/2012/3394}, Volume = {14}, Year = {2012}, bdsk-url-1 = {http://drops.dagstuhl.de/opus/volltexte/2012/3394}, bdsk-url-2 = {http://dx.doi.org/10.4230/LIPIcs.STACS.2012.54}, date-added = {2012-06-05 11:15:02 +0200}, date-modified = {2012-06-05 09:15:13 +0000}, urn = {urn:nbn:de:0030-drops-33940}, doi = {10.4230/LIPIcs.STACS.2012.54} }