1. Cisco Visual Networking Forecast and Methodology: 2012 – 2017; http://www.cisco.com/c/en/us/solutions/collateral/service-provider/ip-ngn-ip-next-generation-network/white_paper_c11-481360.html
2. D.J. Richardson, “Filling the light pipe,” Science, vol. 330, no. 6002, pp. 327-328, 2010
3. T. Rappaport, J. Murdock, and F. Gutierrez: “State of the Art in 60- GHz Integrated Circuits and Systems for Wireless Communications,” Proceedings of the IEEE, vol. 99, no. 8, pp. 1390 –1436, 2011
4. T. Kürner, S. Priebe: “Towards THz Communications – Status in Research, Standardization and Regulation,” J. Infrared Milli Terahz Waves, vol. 35, no. 1, pp. 53 – 62, 2014
5. I. Kallfass, J. Antes, D. Lopez-Diaz, S. Wagner, A. Tessmann, and A. Leuther: “Broadband active integrated circuits for terahertz communication,” in Proc. of 18th European Wireless Conference European Wireless (EW), 5 pages (electronic), Poznan, April 2012