1. A model for reengineering legacy expert systems to object-oriented architecture
2. Blocher, E. “ANSWERS: An Expert System for Financial Analysis.” In Liebowitz, J. (Ed.). Knowledge Systems for Business and Management. Yourdon, 1990, pp. 101–125.
3. Brown, C.E. and D.S. Murphy. “The Use of Auditing Knowledge Systems in Public Accounting,” Journal of Information Systems, Fall 1990, pp. 1–10.
4. Date, C.J. An Introduction to Database Systems. Reading, MA: Addison-Wesley, 1990.
5. Some issues in developing expert marketing systems