1. Standard Specifications for Transportation Materials and Methods of Sampling and Testing;AASHTO,1986
2. Principles of pavement engineering;Thom,2008
3. Repeated loading of fine grained soils;Brown,1987
4. Suitability of using california bearing ratio test to predict resilient modulus;Sukumaran,2002
5. M. Zaman, N. Khoury, Effect of soil suction and moisture on resilient modulus of subgrade soils in Oklahoma, 2007.