1. Thermoelectric Differences Used for Metal Sorting
2. D. K. C. MacDonald, Thermoelectricity: an introduction to the principles (Courier Corporation, 2006).
3. Koslov Scientific Thermoelectric sorter: https://www.koslow.com/manuals/TE-3000.pdf (Accessed on 20.01.2019)
4. C. Eldershaw, Systems for electrochemical sorting of metals and alloys, United States Patent Application Publication, No. 20160245775A1 (25 August 2016)
5. Overview of nondestructive evaluation technologies