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2. BASF, 1994. Keeping Current KC 9138. fifth ed. BASF Corporation: Mount Olive, NJ.
3. Bortone, E., 2014. Section 3: matching product to cooling process. In: Chapter 12: Manufacturing Considerations of Feed Pelleting Reference Guide. Watt Publishing, pp. 1–5. http://www.wattnet.com.
4. Fish. Feed. Technol;Chow,1980