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  Formal Languages and Applications - Carlos Martin-Vide, Victor Mitrana - Google Books

  https://books.google.de/books?id=Qc9s48Kv-Y4C

  Formal Languages and Applications provides a comprehensive study-aid and self-tutorial for graduates students and researchers. The main results and techniques are presented in an readily accessible manner and accompanied by many references and directions…

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  Handbook of Formal Languages: Volume 1. Word, Language, Grammar - Grzegorz Rozenberg - Google Books

  https://books.google.de/books?id=yQ59ojndUt4C

  This first volume of the Handbook of Formal Languages gives a comprehensive authoritative exposition on the core of language theory. Grammars, codes, power series, L systems, and combinatorics on words are all discussed in a thorough, yet self-contained…

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