1. D. Austry, G. Boudol. Algebre de processus et synchronization, Theoretical Computer Science, 1(30), 1984.
2. C. Bernardeschi, A. Fantechi, S. Gnesi. Formal Specification and Verification of the Inter-Channel Consistency Network, GUARDS Esprit project, Technical Report D3A4/6004c, 1997.
3. C. Bernardeschi, A. Fantechi, S. Gnesi, S. Larosa, G. Mongardi, D. Romano. A Formal Verification Environment for Railway Signaling System Design, in Formal Methods in System Design 12, 139–161, 1998.
4. A. Bouali, S. Gnesi, S. Larosa. The integration Project for the JACK Environment, Bulletin of the EATCS, n.54, pp.207–223, 1994. (see also http://repl.iei.pi.cnr.it/projects/JACK .)
5. R.S. Boyer, J.S., Moore. “A Computational Logic”, ACM Monograph Series, Academic Press, 1979.