1. The role of urban consolidation centres in sustainable freight transport;Allen;Transp. Rev.,2012
2. Best Fact, 2013. Zero-Emission Beer Boat in Utrecht. Best Practice Case Quick Info: Urban Freight, from .
3. Browne, M., Sweet, M., Woodburn, A., Allen, J., 2005. Urban freight consolidation centres.
4. Bureau of Transportation Statistics, 2012a. National Transportation Statistics. .
5. Bureau of Transportation Statistics, 2012b. Table 3–3: U.S. Gross Domestic Product (GDP) Attributed to Transportation-Related Final Demand, .