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3. J. L. White, ‘Twin Screw Extrusion: Technology and Principles’, Hanser, Munich (1990)
4. J. L. White, A. Y. Coran, and A. Moet,’Polymer Mixing: Technology and Engineering’, Hanser, Munich (2001)
5. D. Margliano and E. D. Giulio, US Patent (filed Dec. 6, 1956) 3,013,003 (1961)