Seybold, John S. (2005). "1.2 Modes of Propagation". Introduction to RF Propagation. John Wiley and Sons. pp. 3–10. ISBN0471743682. Archived from the original on 2024-09-22. Retrieved 2017-02-03.
Elder, Joe Allen; Cahill, Daniel F. (1984). "Biological Effects of RF Radiation". Biological Effects of Radiofrequency Radiation. US EPA. pp. 5.116–5.119. Archived from the original on 2024-09-22. Retrieved 2019-08-16.
"Ch. 1: Terminology and technical characteristics - Terms and definitions". Radio Regulations(PDF). Geneva, CH: ITU. 2016. p. 7. ISBN9789261191214. Archived(PDF) from the original on 2017-08-29.
"Ch. 1: Terminology and technical characteristics - Terms and definitions". Radio Regulations(PDF). Geneva, CH: ITU. 2016. p. 7. ISBN9789261191214. Archived(PDF) from the original on 2017-08-29.
Seybold, John S. (2005). "1.2 Modes of Propagation". Introduction to RF Propagation. John Wiley and Sons. pp. 3–10. ISBN0471743682. Archived from the original on 2024-09-22. Retrieved 2017-02-03.
Elder, Joe Allen; Cahill, Daniel F. (1984). "Biological Effects of RF Radiation". Biological Effects of Radiofrequency Radiation. US EPA. pp. 5.116–5.119. Archived from the original on 2024-09-22. Retrieved 2019-08-16.