1. Ghent University, Dept. of Civil Engineering, Technologiepark 904, B-9052 Ghent, Belgium
2. Infram, PO Box 81, Patroonsweg 29, 3892 AB Zeewolde, The Netherlands
3. HR Wallingford, Howberry Park, Wallingford, Oxon OX10 8BA, UK
4. MODIMAR, via Montezebio 40, 00915 Rome, IT