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3. M. Davletbaeva, Chemistry, technology and properties of synthetic rubber (2013), p. 31.
4. J. L. White and K. J. Kim, Thermoplastics and rubber compounds: technology and physical chemictry (Cincinatti, 2008), p. 301.
5. J. S. Dick, Raw Materials Supply Chain for Rubber Products (Munich, 2011), p. 58.