1. G. Neelakantan Kartha and Vladimir Lifschitz. Actions with indirect effects (preliminary report). In International Conference on Knowledge Representation and Reasoning, pages 341–350, 1994.
2. Vladimir Lifschitz. Nested abnormality theories. Artificial Intelligence, 74:351–365, 1995.
3. John McCarthy and Patrick Hayes. Some philosophical problems from the view-point of artificial intelligence. In Machine Intelligence, Vol. 4, pages 463–502. Edinburgh University Press, 1969.
4. Tommy Persson and Lennart Staflin. A causation theory for a logic of continuous change. In European Conference on Artificial Intelligence, pages 497–502, 1990.
5. Erik Sandewall. Combining logic and differential equations for describing real-world systems. In Proc. International Conference on Knowledge Representation, Toronto, Canada, 1989.