1. Roads, Encyclopaedia Britannica Online, 2016.
2. John Noble Wildord (1994-05-08). World’s Oldest Paved Road Found in Egypt. The New York Times.
3. The Great Armies of Antiquity;Gabriel,2002
4. History of Rome;Grant,1978
5. Silk Road: Monks, Warriors & Merchants;Boulnois,2005