1. University of Aberdeen, Department of Chemistry, Old Aberdeen, AB24 3UE, Scotland, Großbritannien
2. Universidade Federal de Minas Gerais, Departamento de Quimica, 31270-901 Belo Horizonte, MG, Brasilien
3. University of Malaya, Department of Chemistry, Kuala Lumpur, Malaysia
4. CHEMSOL, Aberdeen AB15 5NY, Großbritannien
5. The University of Texas at San Antonio, Department of Chemistry, San Antonio, Texas 78249-0698, U.S.A.