publications
- Rudolf Wille Proc. ICCS'97, (1997)
- Murray Shanaham MIT Press, Cambridge, MA, (1997)
- Ian Pratt-Hartmann August 1999. Draft for internal use only .
- Ian Pratt-Hartmann January 2000. Draft .
- Robert Kowalski The Computer Science Library, Artificial Intelligence Series North Holland, New York, Oxford, (1979)
- Robert Kowalski What is a Logical System?, Oxford University Press, (1995)
- John A. Kalman Rinton Press, Paramus, NJ, (2001)
- Cordell Green Machine Intelligence, 4, chapter 11, Edinburgh University Press, (1969)
- Lee Flax 93-139C. Macquarie University, (1993)
- Keith L. Clark Logic and Data Bases, 1, Plenum Press, New York, London, (1978)
- L. T. F. Gamut The University of Chicago Press, (1991)


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