1. Chakravarthy S., Blaustein B., et al, “HiPAC: A Research Project in Active, Time-Constrained Database Management”, Final Technical Report, Xerox Advanced Information Technology Division, July 1989
2. Dayal U., Blaustein B., et al, “The HiPAC Project: Combining Active Databases and Timing Constraints”, ACM Sigmod Record, Vol. 17, No. 1, March 1988
3. Dayal U., “Active Database Management Systems”, Sigmod Record, Vol. 18, No. 3, 1989
4. Diaz O. and Paton N. W., “Sharing behaviour in an object-oriented database using a rule-based mechanism”, Proc. 9th British National Conference On Databases, 1991
5. Dittrich K. and Dayal U., “Active Database Systems”, Tutorial Notes, VLDB 91, Barcelona, Spain, September 1991