Current and future trends in bridge design, construction and maintenance safety, economy, sustainability and aesthetics : proceedings of the international conference organized by the Institution of Civil Engineers and held in Singapore on 4-5 October 1999 / edited by P.C. Das, D.M. Frangopol and A.S. Nowak. - Das, Parag C.; Frangopol, Dan M.; Nowak, Andrzej S. (Thomas Telford, 1999)