Frequenz. Journal of RF-Engineering and Telecommunications. Berlin, Boston: De Gruyter. Web. Retrieved 19 May. 2013, from http://www.degruyter.com/view/j/freq

Frequenz. Journal of RF-Engineering and Telecommunications. Berlin, Boston: De Gruyter. Retrieved 19 May. 2013, from http://www.degruyter.com/view/j/freq

Frequenz. Journal of RF-Engineering and Telecommunications. Berlin, Boston: De Gruyter. Retrieved 19 May. 2013, from http://www.degruyter.com/view/j/freq