1. Schreyer C, Maibach M, Schneider C, Rothengatter W, Doll C, Schmedding D. External costs of transport - Update study. Zürich, Karlsruhe: INFRAS, IWW Universität Karlsruhe; 2004.
2. McKinnon A. Logistics and the environment. In: Hensher DA, Button KJ, editors. Handbook of transport and the environment, First Edition, Amsterdam: Pergamon; 2003, p.665-85.
3. Kreutzberger E, Macharis C, Woxenius J. Intermodal versus unimodal road freight transport - A review of comparisions of the external costs. In: Jourquin B, Rietveld P, Westin K, editors. Transportation economics - Towards better performance systems, New York: Routledge; 2006, p.17-42.
4. Woxenius J, Bärthel F. Intermodal road-rail transport in the European Union. In: Priemus H, Nijkamp P, Konings R, editors. The future of intermodal transport: Operations, design and policy, Cheltenham, UK: Edward Elgar; 2008, p.13-33.
5. On structural inelasticity of modal substitution in freight transport;Rich;Journal of Transport Geography,2011