T. Haveliwala, A. Gionis, and P. Indyk. Proceedings of the Third International Workshop on the Web and Databases, WebDB 2000, in conjunction with ACM PODS/SIGMOD 2000, page 129-134. (2000)
M. Halkidi, Y. Batistakis, and M. Vazirgiannis. Proceedings of the 13th International Conference on Scientific and Statistical Database Management, page 3-22. IEEE Computer Society, (2001)
A. Doucet, and H. Ahonen-Myka. INitiative for the Evaluation of XML Retrieval (INEX). Proceedings of the First INEX Workshop. Dagstuhl, Germany, December 8-11, 2002, page 81-87. Sophia Antipolis, France, ERCIM, (March 2002)