1. Agrawal, R., Imielinski, T., & Swami, A. (1993). Mining association rules between sets of items in large databases. In Proceedings of the 1993 ACM SIGMOD international conference on management of data. Washington, DC, USA (pp. 207–216)
2. Agrawal, R., & Srikant, R. (1994). Fast algorithms for mining association rules. In Proceedings of the 20th international conference on very large data bases, Santiago, Chile (pp. 478–499)
3. Information and knowledge based systems: An introduction;Anderson,1992
4. Bagga, A. (1998). Analyzing the complexity of a domain with respect to an information extraction task. In Proceedings of the seven message understanding conference, Virginia, USA. Available: http://www.itl.nist.gov/iaui/894.02/related.projects/muc/proceed-ings/muc_7_toc.html#infoextract/
5. Subject access in online catalogs: a design model;Bates;Journal of the American Society for Information Science,1986