- Authors: Lopes M., Gomes P., Martins H., Borrego C.
- Title: Costs and externalities of road transport in Portugal
- Conference Title: Urban Transport XVI, Urban Transport and the Environment in the 21st Century
- Conference Location: Limassol, Chipre
- Conference Date: 5-7 May
- Year Published: 2010
- link: http://www.witpress.com/978-1-84564-456-7.html