Радио (Serbian Wikipedia)

Okamura 1994, стр. 20. sfn грешка: више циљева (2×): CITEREFOkamura1994 (help) Okamura, Sōgo (1994). History of Electron Tubes. IOS Press. стр. 17—22. ISBN 978-90-5199-145-1.
Godfrey, Donald G. (1998). „Audion”. Historical Dictionary of American Radio. Greenwood Publishing Group. стр. 28. Приступљено 7. 1. 2013.
Okamura 1994 harvnb грешка: више циљева (2×): CITEREFOkamura1994 (help) Okamura, Sōgo (1994). History of Electron Tubes. IOS Press. стр. 17—22. ISBN 978-90-5199-145-1.
Amos, S. W. (2002). „Triode”. Newnes Dictionary of Electronics, 4th Ed. Newnes. стр. 331. Приступљено 7. 1. 2013.
Hijiya 1992 Hijiya, James A. (1992). Lee de Forest. Lehigh University Press. стр. 77. ISBN 978-0-934223-23-2.
Lee 2004 Lee, Thomas H. (2004). Planar Microwave Engineering: A Practical Guide to Theory, Measurement, and Circuits. Cambridge University Press. стр. 13—14. ISBN 978-0-521-83526-8.
Hempstead & Worthington 2005 Hempstead, Colin; Worthington, William E. (2005). Encyclopedia of 20th-Century Technology, Vol. 2. Taylor & Francis. стр. 643. ISBN 978-1-57958-464-1.
Nebeker 2009, стр. 14–15 Nebeker, Frederik (2009). Dawn of the Electronic Age: Electrical Technologies in the Shaping of the Modern World, 1914 to 1945. John Wiley & Sons. стр. 14—15. ISBN 978-0-470-40974-9.

curry.edu

Guarnieri, M. (2012). „The age of vacuum tubes: Early devices and the rise of radio communications”. IEEE Ind. Electron. M.: 41—43. doi:10.1109/MIE.2012.2182822.
De Forest, Lee (1906). „The Audion; A New Receiver for Wireless Telegraphy”. Trans. of the AIEE. American Institute of Electrical and Electronic Engineers. 25: 735—763. doi:10.1109/t-aiee.1906.4764762. Приступљено 7. 1. 2013. The link is to a reprint of the paper in the Scientific American Supplement, No. 1665, November 30, (1907). стр. 348.–350, copied on Thomas H. White's United States Early Radio History website
Guarnieri, M. (2012). „The age of vacuum tubes: the conquest of analog communications”. IEEE Ind. Electron. M.: 52—54. doi:10.1109/MIE.2012.2193274.

De Forest, Lee (1906). „The Audion; A New Receiver for Wireless Telegraphy”. Trans. of the AIEE. American Institute of Electrical and Electronic Engineers. 25: 735—763. doi:10.1109/t-aiee.1906.4764762. Приступљено 7. 1. 2013. The link is to a reprint of the paper in the Scientific American Supplement, No. 1665, November 30, (1907). стр. 348.–350, copied on Thomas H. White's United States Early Radio History website

U.S. Patent 879,532
De Forest patented a number of variations of his detector tubes starting in 1906. The patent that most clearly covers the Audion is U.S. Patent 879.532, Space Telegraphy, filed January 29, 1907, issued February 18, 1908

Baudino, Joseph E.; Kittross, John M. (1977). „Broadcasting's Oldest Stations: An Examination of Four Claimants”. Journal of Broadcasting: 61—82. Архивирано из оригинала 6. 3. 2008. г. Приступљено 18. 1. 2013.

Atgelt, Carlos A. "Early History of Radio Broadcasting in Argentina." The Broadcast Archive (Oldradio.com).

Fessenden — The Next Chapter RWonline.com Архивирано на сајту Wayback Machine (16. септембар 2009)

Fessenden — The Next Chapter RWonline.com Архивирано на сајту Wayback Machine (16. септембар 2009)
Baudino, Joseph E.; Kittross, John M. (1977). „Broadcasting's Oldest Stations: An Examination of Four Claimants”. Journal of Broadcasting: 61—82. Архивирано из оригинала 6. 3. 2008. г. Приступљено 18. 1. 2013.