@article{Werner198295,
    Author = {Damm, Werner},
    File = {The IO- and OI-hierarchies - Damm (0) (0) - a - a - b.pdf},
    ISSN = {0304-3975},
    Journal = {Theor. Comput. Sci.},
    Keywords = {higher-order pushdown automata and higher-order recursion schemes and classic and readme},
    Number = {2},
    Pages = {95 - 207},
    Title = {{The IO- and OI-hierarchies}},
    URL = {http://www.sciencedirect.com/science/article/pii/0304397582900093},
    Volume = {20},
    Year = {1982},
    bdsk-url-1 = {http://www.sciencedirect.com/science/article/pii/0304397582900093},
    bdsk-url-2 = {http://dx.doi.org/10.1016/0304-3975(82)90009-3},
    date-added = {2012-03-06 11:34:14 +0100},
    date-modified = {2014-01-01 14:50:19 +0000},
    doi = {10.1016/0304-3975(82)90009-3}
}

@article{Werner198295, Author = {Damm, Werner}, File = {The IO- and OI-hierarchies - Damm (0) (0) - a - a - b.pdf}, ISSN = {0304-3975}, Journal = {Theor. Comput. Sci.}, Keywords = {higher-order pushdown automata and higher-order recursion schemes and classic and readme}, Number = {2}, Pages = {95 - 207}, Title = {{The IO- and OI-hierarchies}}, URL = {http://www.sciencedirect.com/science/article/pii/0304397582900093}, Volume = {20}, Year = {1982}, bdsk-url-1 = {http://www.sciencedirect.com/science/article/pii/0304397582900093}, bdsk-url-2 = {http://dx.doi.org/10.1016/0304-3975(82)90009-3}, date-added = {2012-03-06 11:34:14 +0100}, date-modified = {2014-01-01 14:50:19 +0000}, doi = {10.1016/0304-3975(82)90009-3} }