@article{Seki:2008:GPM:1522667.1522686,
    Address = {Oxford, UK},
    Author = {Seki, Hiroyuki and Kato, Yuki},
    File = {On the Generative Power of Multiple Context-Free Grammars and Macro Grammars - Seki, Kato (0) (0) - a - a - h.pdf},
    ISSN = {0916-8532},
    Journal = {IEICE - Trans. Inf. Syst.},
    Keywords = {context-free tree grammar, generative power, linearity, macro grammar, multiple context-free grammar},
    Month = {February},
    Number = {2},
    Pages = {209--221},
    Publisher = {Oxford University Press},
    Title = {On the Generative Power of Multiple Context-Free Grammars and Macro Grammars},
    URL = {http://dx.doi.org/10.1093/ietisy/e91-d.2.209},
    Volume = {E91-D},
    Year = {2008},
    acmid = {1522686},
    bdsk-url-1 = {http://dx.doi.org/10.1093/ietisy/e91-d.2.209},
    date-added = {2014-02-24 22:18:06 +0000},
    date-modified = {2014-02-24 22:18:06 +0000},
    issue_date = {February 2008},
    numpages = {13},
    doi = {10.1093/ietisy/e91-d.2.209}
}

@article{Seki:2008:GPM:1522667.1522686, Address = {Oxford, UK}, Author = {Seki, Hiroyuki and Kato, Yuki}, File = {On the Generative Power of Multiple Context-Free Grammars and Macro Grammars - Seki, Kato (0) (0) - a - a - h.pdf}, ISSN = {0916-8532}, Journal = {IEICE - Trans. Inf. Syst.}, Keywords = {context-free tree grammar, generative power, linearity, macro grammar, multiple context-free grammar}, Month = {February}, Number = {2}, Pages = {209--221}, Publisher = {Oxford University Press}, Title = {On the Generative Power of Multiple Context-Free Grammars and Macro Grammars}, URL = {http://dx.doi.org/10.1093/ietisy/e91-d.2.209}, Volume = {E91-D}, Year = {2008}, acmid = {1522686}, bdsk-url-1 = {http://dx.doi.org/10.1093/ietisy/e91-d.2.209}, date-added = {2014-02-24 22:18:06 +0000}, date-modified = {2014-02-24 22:18:06 +0000}, issue_date = {February 2008}, numpages = {13}, doi = {10.1093/ietisy/e91-d.2.209} }