Speech given at First National Fair of Natural Products, São Paulo Brazil, 1991.

Speech given at The University of Miami, Miami, Florida, USA, 1990.

Speech given at Swiss Bank Corp, Zurich, Switzerland, 1990.

Speech given at Observador Legal Editora Inc. and Noronha Advogados, São Paulo, Brazil, 1989.

Speech given at Observador Legal Editora Inc., São Paulo, Brazil, 1989.