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2. Reiser, M.: Theory and Design of Charged Particle Beams, 634p. John Wiley & Sons (2008). https://www.wiley.com/en-us/Theory+and+Design+of+Charged+Particle+Beams-p-9783527617630. Accessed 21 Nov 2016
3. Szilagyi, M.: Electron and Ion Optics, 539p. Springer, Cham (2012). https://www.amazon.com/Electron-Optics-Microdevices-Miklos-Szilagyi/dp/1461282470
4. Humphries, S.J.R.: Charged Particle Beams, 834p. Courier Corporation (2013). https://library.uoh.edu.iq/admin/ebooks/76728-charged-particle-beams---s.-humphries.pdf
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