1. Universidade de Lisboa (University of Lisbon), and CERENA, "Centro de Recursos Naturais e Ambiente" (Centre for Natural Resources and the Environment),IST,Department of Chemical Engineering,Lisboa (Lisbon),Portugal,1049-001
2. Universidade de Lisboa (University of Lisbon),IST,Dept. of Computer Science and Eng.ing,Lisboa (Lisbon),Portugal,1049-001
3. Universidade de Lisboa (University of Lisbon), and CERENA,IST,Dept. of Chemical Eng.ing,Lisboa (Lisbon),Portugal,1049-001
4. Politécnico de Portalegre (Polytechnic of Portalegre), and CERENA,ESTG,Dept. of Technologies,Portalegre,Portugal,7300-555