1. A. V. Aho, R. Sethi, and J. D. Ullman. COMPILERS Principles, Techniques and Tools. Bell Telephone Laboratories, Inc., 1987.
2. K. Boehm. Verwendung objektorientierter Datenbanktechnologie zur Verwaltung str ukturierter Dokumente. PhD thesis, Technische Hochschule Darmstadt, 1997. (in German).
3. J. Clark. Comparison of SGML and XML, December 1997. http://www.w3.org/TR/NOTE-sgml-xml-971215 .
4. A. Deutsch, M. F. Fernandez, and D. Suciu. Storing Semistructured Data with STORED. In A. Delis, C. Faloutsos, and S. Ghandeharizadeh, editors, SIGMOD 1999, Proceedings ACM SIGMOD International Conference on Management of Data, June 1–3, 1999, Philadephia, Pennsylvania, USA, pages 431–442. ACM Press, 1999.
5. L. Dittmann, P. Fankhauser, and A. Maric. AMetaCar-a mediated eCommerce-Solution for the Used-Car-Market. In R.-D. Kutsche, U. Leser, and J. C. Freytag, editors, 4. Workshop “Federated Databases”, November 1999, Berlin, Germany, Proceedings, pages 18–33. Technical University of Berlin, 1999.