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@Unpublished{KraussNipkow11,
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  year = 	 {2011}
}

@Book{Kozen97,
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@incollection{Constable00,
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@article{OwensSlind08,
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@article{Brzozowski64,
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}

@book{HopcroftUllman69,
  author    = {J.~E.~Hopcroft and
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@inproceedings{BerghoferReiter09,
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@Article{Church40,
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@ARTICLE{Antimirov95,
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@ARTICLE{Brzozowski10,
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@book{Sakarovitch09,
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@inproceedings{WuZhangUrban11,
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}