1. American Association of State Highway and Transportation Officials (AASHTO). AASHTO Guide for Design of Pavement Structures. American State Highway and Transportation Officials, Washington D.C. 1993.
2. Mechanistic-Empirical Pavement Design Guide: A Manual of Practice;AASHTO MEPDG-2.,2015
3. Estimation of Resilient Modulus of Subgrade Soils for Design of Pavement Structures;Nazzal;J. Mater. Civ. Eng.,2010
4. American Association of State Highway and Transportation Officials (AASHTO). Determining the Resilient Modulus of Soils and Aggregate Materials. T 307. Standard Specifications for Transportation Materials and Methods of Sampling and Testing: Part 2B Tests. American Association of State Highway and Transportation Officials, Washington D.C. 1999.
5. M.W. Witczak, Harmonized Test Methods for Laboratory Determination of Resilient Modulus for Flexible Pavement Design. Final Report, NCHRP Project 1-28A, National Cooperative Highway Research Program, 2003.