@inproceedings{Aho:1969:TCF:800169.805425,
    Address = {New York, NY, USA},
    Author = {Aho, A. V. and Ullman, J. D.},
    BookTitle = {Proceedings of the First Annual ACM Symposium on Theory of Computing},
    File = {Translations on a Context Free Grammar - Aho, Ullman (0) (0) - a - a - i.pdf},
    Keywords = {tree-walking automata and classic},
    Location = {Marina del Rey, California, USA},
    Pages = {93--112},
    Publisher = {ACM},
    Series = {STOC '69},
    Title = {Translations on a Context Free Grammar},
    URL = {http://doi.acm.org/10.1145/800169.805425},
    Year = {1969},
    acmid = {805425},
    bdsk-url-1 = {http://doi.acm.org/10.1145/800169.805425},
    bdsk-url-2 = {http://dx.doi.org/10.1145/800169.805425},
    date-added = {2014-02-23 08:25:26 +0000},
    date-modified = {2014-02-23 08:31:02 +0000},
    numpages = {20},
    doi = {10.1145/800169.805425}
}

@inproceedings{Aho:1969:TCF:800169.805425, Address = {New York, NY, USA}, Author = {Aho, A. V. and Ullman, J. D.}, BookTitle = {Proceedings of the First Annual ACM Symposium on Theory of Computing}, File = {Translations on a Context Free Grammar - Aho, Ullman (0) (0) - a - a - i.pdf}, Keywords = {tree-walking automata and classic}, Location = {Marina del Rey, California, USA}, Pages = {93--112}, Publisher = {ACM}, Series = {STOC '69}, Title = {Translations on a Context Free Grammar}, URL = {http://doi.acm.org/10.1145/800169.805425}, Year = {1969}, acmid = {805425}, bdsk-url-1 = {http://doi.acm.org/10.1145/800169.805425}, bdsk-url-2 = {http://dx.doi.org/10.1145/800169.805425}, date-added = {2014-02-23 08:25:26 +0000}, date-modified = {2014-02-23 08:31:02 +0000}, numpages = {20}, doi = {10.1145/800169.805425} }