1. ASTM D1566-04, 2004. Standard Terminology Relating to Rubber.
2. ASTM D1795-04, 2004. Standard Classification System for Carbon Blacks Used in Rubber Products.
3. ASTM D2227-96, 2002. Standard Specification for Natural Rubber Technical Grades.
4. ASTM D3053-04, 2004. Standard Terminology Relating to Carbon Black.
5. ASTM D3184-89, 1989. Standard Methods for Evaluation and Test Formulations for Natural Rubber.