Special lectures presented at the International Symposium on the chemistry of natural products held in Melbourne, Canberra and Sydney, Australia, August 1960 and organized by the Austrelian Academy of Science
(1961)
Proc. of a Seminar organized by the Comiss. of the European Commun., Directorate-General Science, Res. and Dev. Environment Res. Programme, held in Athens, Greece, 14-15 May 1984
(1986)
