1. Alchourron C., Bulygin E. (1981) The expressive conception of norms. In: Hilpinen E., (eds) New studies in Deontic Logic. D. Reidel, Dordrecht, pp 95–124
2. Boer A. (2000) The Consultancy Game. In: Breuker J., Leenes R., Winkels R., (eds) Legal Knowledge and Information Systems (JURIX-2000). Amsterdam, IOS Press, pp 99–112
3. Boer A., Hoekstra R., Winkels R., van Engers T., Willaert F. (2002)
META
lex: Legislation in XML. In: Bench-Capon T., Daskalopulu A., Winkels R., (eds) Legal Knowledge and Information Systems (Jurix 2002). Amsterdam, IOS Press, pp 1–10
4. Boer, A., van Engers, T. and Winkels, R. (2003). Using Ontologies for Comparing and Harmonizing Legislation. In Proceedings of the International Conference on Artificial Intelligence and Law (ICAIL), Edinburgh (UK), ACM Press
5. Boer A., Winkels R., van Engers T., de Maat E. (2004) A content management system based on an event-based model of version management information in legislation. In: Gordon T., (eds) Legal Knowledge and Information Systems. Jurix 2004: The Seventeenth Annual Conference. Amsterdam, IOS Press, pp 19–28