1. Standard Test Method of Tests for Resilient Modulus of Subgrade Soils and Untreated Base/Subbase Materials;AASHTO T 294-94,1994
2. Standard Method of Test for Determining the Resilient Modulus of Soils and Aggregate Materials;AASHTO T 307-99,2007
3. Modification of clayey soils using scrap tire rubber and synthetic fibers;Akbulut;Appl. Clay Sci.,2007
4. Methods of Testing Soils for Engineering Purposes, Method 3.1.1: Soil Classification Tests - Determination of the Liquid Limit of a Soil - Four Point Casagrande Method;AS 1289.3.1.1,2009
5. Methods of Testing Soils for Engineering Purposes, Method 3.2.1: Soil Classification Tests - Determination of the Plastic Limit of a Soil - Standard Method;AS 1289.3.2.1,2009