1. Aiken, A., Hellerstein, J. M., & Widom, J. (1995). Static analysis techniques for predicting the behaviour of active database rules. ACM Transaction on Database Systems, 20, 3–41.
2. Arenas, M., & Bertossi, L. (1998). Hypothetical temporal queries in databases. In A. Borgida, V. Chaudhuri, & V. Staudt (Eds.), Proceedings of the ACM SIGMOD/PODS 5th international workshop on knowledge representation meets Databases (pp. 4.1–4.8). http://sunsite.informatik.rwth-aachen.de/Publications/CEUR-WS/Vol-10/ .
3. Bailey, J., & Mikulás, S. (2001). Expressiveness issues and decision problems for active database event queries. In Proceedings of the international conference on database theory (pp. 68–82). London, UK: Springer.
4. Baral, C., Lobo, J., & Trajcevski, G. (1997). Formal characterizations of active databases: Part II. In Proceedings of the international conference on deductive and object-oriented databases (pp. 247–264). Montreux, Switzerland: Springer.
5. Baralis, E., Ceri, S., & Widom J. (1993). Better termination analysis for active databases. In Proceedings of the international workshop on rules in database systems (pp. 163–179). Edinburgh, Scotland: Springer.