Tham khảo Đèn điện tử chân không 3 cực

  1. ↑ Aitken, Hugh G.J. (2014). The Continuous Wave: Technology and American Radio, 1900-1932. Princeton University Press. p. 195. ISBN 1400854601.
  2. ↑ Fisher, David E.; Fisher, Marshall (1996).Tube: The Invention of Television. Counterpoint. p. 54.ISBN 1887178171.
  3. ↑ Anton A. Huurdeman, The Worldwide History of Telecommunications, John Wiley & Sons - 2003, page 226
  4. ↑ John Bray, TheCommunications Miracle: The Telecommunication Pioneers from Morse to the Information Superhighway, Springe - 2013, pages 64-65
  5. ↑ [1] Lưu trữ 2018-04-28 tại Wayback Machine DRP 179807
  6. ↑ Tapan K. Sarkar (ed.) "History of wireless", John Wiley and Sons, 2006. ISBN 0-471-71814-9, p.335
  7. ↑ Sōgo Okamura (ed), History of Electron Tubes, IOS Press, 1994 ISBN 90-5199-145-2 page 20