1. S. Abramsky and C. Hankin. Abstract Interpretation of Declarative Languages. Ellis Horwood, 1987.
2. F. Baader and J. Siekmann. Unification theory. In D. Gabbay, C. Hogger, and J. Robinson, editors, Handbook of Logic in Artificial Intelligence and Logic Programming, volume 2, pages 41–126. Oxford University Press, 1994.
3. R. Bagnara. China: A data-flow analyzer for CLP languages. Survey at URL http://www.cs.unipr.it/China/ , 19 February 2001.
4. F. Bancilhon, D. Maier, Y. Sagiv, and J. Ullman. Magic sets and other strange ways to implement logic programs. In Proc. Fifth ACM SIGMOD/SIGACT Symp. Principles of Database Systems, pages 1–15. ACMPress, 1986.
5. R. Barbuti, R. Giacobazzi, and G. Levi. A general framework for semantics-based abstract interpretation. ACM Transactions on Programming Languages, 15(1):133–181, 1993.