1. Assistant Professor, Dept. Structural and Geotechnical Engineering (DISTR), Politecnico di Torino, room 7 Corso Duca degli Abruzzi 24, 10129 Turin, Italy; formerly, Dept. Civil, Structural and Environmental Engineering, Univ. at Buffalo, The State Univ. New York, 206 Ketter Hall, Buffalo, NY 14260.
2. Clifford C. Furnas Eminent Professor, Dept. Civil, Structural, and Environmental Engineering, Univ. at Buffalo, The State Univ. New York, 135 Ketter Hall, Buffalo, NY 14260.
3. Associate Professor, Department of Constructions, Univ. of Florence, Italy.
4. Professor and Chair, Department of Constructions, Univ. of Florence, Italy.