1. Ait Kaci H. and Nasr R., Login: A Logic Programming Language with Built-in Inheritance, Journal of Logic Programming, 1986.
2. Borgida A., Exceptions in Object-Oriented Languages, Sigplan Notices, Oct 1986.
3. Brachman, R., “I Lied About the Trees Or Defaults and Definitions in Knowledge Representation”, AI Magazine, Fall, 1985.
4. Brachman, R., “What Is-a is and Isn’t”, AI Magazine, Fall 1985.
5. Bruce K. B., and Wegner P., An Algebraic Model of Subtypes and Inheritance, Brown University Report, July 1987, also in Proc Roscoff Conference on Database Programming Languages, Sept 1987.