1. Antoninus of Piacenza. (2010). Itinerary of Antoninus. Encyclopedia Britannica.
2. Distress Guide. (2015). Road Science.
http://www.roadscience.net/services/distress-guide
.
3. Gillespie, H. (1992). A century of progress: The history of hot asphalt mix. National Asphalt Pavement Association.
4. Huang, Y. (2004). Pavement analysis and design (2nd ed.). Prentice Hall.
5. Keel, D. (2009). BELMARSH: Timber trackway 500 years older than Stonehenge found by archaeologists. News.