1. A. Bonomi. Eventi mentali. Il Saggiatore, 1983.
2. IRST-Technical Report 9312-01, IRST;A. Cimatti,1995
3. G. Frege. über Sinn und Bedeutung. Zeitschrift fur Philosophie und Philosophische Kritik, 100:25–50, 1892. English translation in [12].
4. C. Ghidini and L. Serafini. Distributed First Order Logics. Technical Report 9804-02, IRST, May 1998. Accepted for presentation at the First International Workshop on Labelled Deduction (LD'98). Freiburg, Germany. September 7–9, 1998.
5. E. Giunchiglia and F. Giunchiglia. Ideal and Real Belief about Belief. In Practical Reasoning, International Conference on Formal and Applied Practical Reasoning, FAPR'96, number 1085 in Lecture Notes in Artificial Intelligence, pages 261–275. Springer Verlag, 1996.