1. Abiteboul, S., Hull, R. and Vianu, V. Foundations of Databases, Addison-Wesley, 1995.
2. Lars Bkgaard, Leo Mark, Incremental Computation of Time-Varying Query Expressions, TKDE 7(4), 1995.
3. E. Baralis and J. Widom, An algebraic approach to static analysis of active database rules, TODS 25(3), September 2000.
4. Stefano Ceri, Roberta J. Cochrane, Jennifer Widom, Practical Applications of Triggers and Constraints: Success and Lingering Issues, In Proc of 26th VLDB Conference 2000, pp 254–262, Cairo, Egypt, September 10–14, 2000.
5. Cheung, D. W., Han, J., Ng, V. and Wong, C. Y. Maintenance of discovered Association Rules in large databases: An Incremental Updating Technique, in Proceedings of ICDE, 1996.