@Book{Aho:72,
  author = 	 {Alfred.~V. Aho and Jeffrey~D. Ullman.},
  title = 	 {The Theory of Parsing, Translation and Compiling},
  publisher = 	 {Prentice-Hall},
  year = 	 1972,
  volume =	 1,
  address =	 {Englewood Cliffs, NJ}
}

@Manual{APA:83,
  title = 	 {Publications Manual},
  author =	 {American Psychological Association},
  organization = {American Psychological Association},
  address =	 {Washington, DC},
  year =	 1983
}

@Article{ACM:83,
  author = 	 {Association for Computing Machinery},
  title = 	 {Computing Reviews},
  journal = 	 {Journal of the Association for Computing Machinery},
  year = 	 1983,
  volume =	 24,
  number =	 11,
  pages =	 {503--512}
}

@Article{Chandra:81,
  author = 	 {Ashok~K. Chandra and Dexter~C. Kozen and Larry~J. Stockmeyer},
  title = 	 {Alternation.},
  journal = 	 {Journal of the Association for Computing Machinery},
  year = 	 1981,
  volume =	 28,
  number =	 1,
  pages =	 {114--133}
}

@Book{Gusfield:97,
  author = 	 {Dan Gusfield},
  title = 	 {Algorithms on Strings, Trees and Sequences},
  publisher = 	 {Cambridge University Press},
  year = 	 1997,
  address =	 {Cambridge, UK}
}