1. Apt, K. R., Blair, H., Walker A., Towards a Theory of Declarative Knowledge in Foundations of Deductive Databases and Logic Programming J. Minker (Ed.), Morgan Kaufman, 89–148, 1988.
2. Bobrow D.G., Katz R.H., Context Structures/Versioning: A Survey, in [3].
3. Brodie M., Mylopoulos J., On Knowledge Base Management Systems, Springer-Verlag, 1986.
4. Borgida A., Survey of Conceptual Modeling of Information Systems, in [3]
5. Bancilhon F., Ramakrishnan R., An Amateur’s Introduction to Recursive Query Processing Strategies, Proceedings ACM SIG-MOD Conference on Management of Data, 16–52, 1986.