1. Auernheimer, B., Kemmerer, R. 1986. RT-ASLAN: A Specification Language for Real-Time Systems. IEEE TSE, vol. SE-12.
2. Bell, J., Machover, M. 1977. A Course in Mathematical Logic. Amsterdam: North-Holland.
3. Ben-Ari, M., Pnueli, A., Manna, Z. 1983. The Temporal Logic of Branching Time. Acta Informatica.
4. Borgida, A., Greenspan, S., Mylopoulos, J. 1985. Knowledge Representation as the Basis for Requirements Specifications. IEEE Computer, vol. 18(4).
5. Brachman, R., J. 1983. What IS-A is and isn't: an Analysis of Taxonomic Links in Semantic Networks. IEEE Computer, vol. 16.