1. From regular expressions to deterministic automata;Berry;Theoret. Comput. Sci.,1986
2. T. Bray, D. Hollander, A. Layman, J. Clark, Namespaces in XML, 1999, 〈http://www.w3.org/TR/REC-xml-names〉.
3. T. Bray, J. Paoli, C.M. Sperberg-McQueen, E. Maler, Extensible markup language (XMLTM), 2000, 〈http://www.w3.org/XML/〉.
4. A. Brüggemann-Klein, M. Murata, D. Wood, Regular tree and regular hedge languages over unranked alphabets, Technical Report HKUST-TCSC-2001-0, The Hongkong University of Science and Technology, 2001.
5. Derivatives of regular expressions;Brzozowski;J. ACM,1964