1. 5th Convegno Italiano di Scienza delle Macromolecole, AIM, Milano (ITALY) (1981).
2. and : AIM Conference on ?Additives for Polymers,? Camogli (Italy) (1982).
3. ?International Symposium on Macromolecules,? IUPAC, Firenze (Italy) (1980).
4. ; ?Toughened Plastics,? Applied Science Publ Ltd., London (1977).
5. and IUPAC Intern. Symp., Athens (1982)