http://arxiv.org/abs/1012.4153 http://arxiv.org/abs/1012.4153 https://en.wikipedia.org/wiki/Terahertz_radiation#Safety https://en.wikipedia.org/wiki/Terahertz_

http://arxiv.org/abs/1012.4153 http://arxiv.org/abs/1012.4153 https://en.wikipedia.org/wiki/Terahertz_radiation#Safety https://en.wikipedia.org/wiki/Terahertz_radiation#Safety