1. SATRA (1994) Rubber, Footwear Open Tech. London: Satra Footwear Technology Center, Module 31.
2. AKÇAKALE, N. (2008) Investigation of the Effect of Some Additives on the Mechanical Properties of NR/SBR Elastomer Based Sole Materials. [PhD Thesis] Adapazan, Turkey Sakarya University.
3. JONES, K. AND TINKER, A. (1997) Blends of Natural Rubber, London: Novel Techniques for Blending with Specialty Polymers. London: Chapman & Hall
4. VISCONTE, L.L.Y., MARTINS, A.F., SUAREZ, J.C.M. AND NUNES, R.C.R. (2004) Different Preparative Modes for the Incorporation of Additives in NR/SBR Blends. J. Appl. Polym. Sci., 93(2), 483–489.
5. SHUNDO, M., IMOTO, M. AND MINOURA, Y. (1966) Studies on Polymer Blends: Blending Methods for Natural Rubber and Styrene-Butadiene Rubber. J. Appl. Polym. Sci., 10(6), 939–953.