1. AASHTO T 315-08;AASHTO (American Association of State Highway and Transportation Officials),2008
2. ASTM (American Society for Testing and Materials), 2003. Standard Test Method for Density of Semi-solid Bituminous Materials, ASTM D70-03. ASTM International, USA.
3. ASTM D36-06;ASTM (American Society for Testing and Materials),2006
4. ASTM D4124-09;ASTM (American Society for Testing and Materials),2009
5. ASTM D4402/D4402M-12;ASTM (American Society for Testing and Materials),2012