Sabzali, Mahdi, Khademi Nadoushan, Farhang, Gudarzi, Alireza, sodaei, Bita, Sadeghi  Saghdel, Hossein. “Analysis of Silver Coins during Phraates IV Period Based on PIXE Method.” Payām-e Bāstānshenās, vol. 9, no. 17, 2012, pp. 103-112.