1. Baumgartner, F.R., Jones, B.D.: Policy Dynamics. University of Chicago Press (2002)
2. Davis, R.: Meta-rules: reasoning about control. Artif. Intell. 15, 179–222 (1980)
3. Davis, R., Buchanan, B.G.: Meta-level knowledge: overview and applications. In: Proceedings of 5th IJCAI, pp. 920–927 (1977)
4. Galton, A.: Operators vs. arguments: the ins and outs of reification. Synthese 150, 415–441 (2006)
5. Hebb, D.O.: The Organization of Behavior: A Neuropsychological Theory. Wiley, London (1949)