1. T. Rakesh, P. K. W and S. Mansour: Toner-Modified Asphalt Compositions, US Patent, 2000, 13681.
2. Encyclopedia of Polymer Science and Technology;Herman,1965
3. Construction Materials: Their Nature and Behavior;Illston,2001
4. Asphalts and Allied Substances;Abraham,1945
5. Encyclopedia of Industrial Chemist;Gerhartz,1985