Links - Rule Based Systems at the Vrije Universiteit Brussel (VUB)
Tons of interesting aritcles at the System and Software Engineering lab (SSEL) ... many need a bit of googling to find them all.
Many links can be found on the VUB Publications page. Also check out the thesises ... thesii ? ...
The general basis of many of the articles is Aspect Oriented Programming, but the focus at VUB is business rules and rule-based systems.