Kehrer, Daniel, Gernot Steinlesberger, Klaus Aufingcr, Harald Tischer, Hans-Dieter Wohlmuth, Verner Simburger, and Arpad L. Scholtz. “Prospects of Microstrip Waveguides in Aluminum and Copper Metallization for High-Frequency Applications<br /&gt;10.14209/Jcis.2003.1”. Journal of Communication and Information Systems 18, no. 1 (June 18, 2015). Accessed October 17, 2019. https://jcis.sbrt.org.br/jcis/article/view/320.