1. Ancona, D., Cerioli, M., Zucca, E.: A formal framework with late binding. Technical Report DISI-TR-98-16, Dipartimento di Informatica e Scienze dell’Informazione. Università di Genova (1998)
2. Progress in Theoretical Computer Science;G. Castagna,1997
3. Lecture Notes in Computer Science;M. Cerioli,1998
4. Lecture Notes in Computer Science;C. Chambers,1992
5. EATCS Monograph in Computer Science;H. Ehrig,1985