1. Creative nodes, logistical networks and the future of metropolis;Andersson;Transpn.,1988
2. Innovazione tecnologica e nuovo ordine urbano;Ardigò,1990
3. Transportation for the future;Batten,1989
4. On transport in Europe: the last 50 years and the next 20;Marchetti,1987
5. Die Magnetbahnentwicklung in der DBR;Mayer,1984