1. E. Astesiano, G. Reggio. Algebraic Specification of Concurrency, in:Recent Trends in Data Type Specification, LNCS 655, (M. Bidoit, C. Choppy), pp. 1–39, Springer Verlag, 1993.
2. E. Battiston, O. Botti, E. Crivelli, F. De Cindio. An Incremental Specification of a Hydroelectric Power Plant Control System using a class of modular algebraic nets, in: Proc. of the “16th Int. Conference on Application and Theory of Petri nets, Torino, I, 28à30 June 1995”, LNCS 935, (G. De Michelis, M. Diaz), pp. 84–102, Springer Verlag,1995.
3. E. Battiston, V. Crespi, F. De Cindio, G. Mauri. Semantics frameworks for a class of modular algebraic nets, inProc. of the “3rd Int. Conference on Algebraic Methodology and Software Technology, AMAST ‘83, Enschede, NL, 21–25 June 1993”, Workshops in Computing, (M. Nivat, C.Rattay, T.Rus and G.Scollo), pp. 271–280, Springer-Verlag, 1993.
4. E. Battiston, F. De Cindio, G. Mauri. OBJSA nets: a class of high level nets having objects as domains, in “Advances in Petri Nets 88”, LNCS 340, (G. Rozenberg ed.), pp. 20–43, Springer Verlag,1988. Also in [20].
5. E. Battiston, F. De Cindio, G. Mauri, L. Rapanotti. Morphisms and Minimal Models for OBJSA Nets, in Proc. of the “12th Int. Conference on Application and Theory of Petri nets, Gjern, DK, 26à28 June 1991”, pp. 455–476.