1. Differences among car user groups regarding CO2 emissions;Cavalini,1993
2. Cavalini, P.M., Hendrickx, L. and Rooijers, A.J. (1995). Differences among car user groups regarding their sensitivity to policy measures,Rijksuniversiteit Groningen. In press.
3. Why we should and how we could reduce the use of motor vehicles in the near future;Vlck;Journal of the International Association of Traffic and Safety Sciences,1992