File International Conference on High Energy Physics, Lisbon (Portugal), July 9-15, 1981. Correspondence from year 1981
File International School of Physics "Ettore Majorana", Erice, March 13-21, 1979; EPS Conference, Geneva 1979; Lectures 1979
File International School of Subnuclear Physics, Erice, 1974 - Cracow School of Theoretical Physics, Cracow, 1974 - Finnish Summer School in Theoretical Physics, Helsinki, 1974. Correspondence from year 1974.
File Learning about chromodynamics (Physics in collision IV, Santa Cruz, August 1984) and quark collisions