1. Margraf M, Jahn S, Flucke J, Jacob R, Habchi V, Ishikawa T, Gopala Krishna A, Brinson M, Parruitte H, Roucaries B, Kraut G. Qucs (Quite Universal Circuit Simulator). Version 0.0.14. 2008. Available from: http://qucs.sourceforge.net/index.html.
2. The Qucs graphical user interface is based on Qt® by Trolltech®, Norway. Available from: http://www.trolltech.com. 1995.
3. Brinson M. Qucs: A Tutorial; Qucs Simulation of SPICE Netlists. 2007. Available from: http://qucs.sourceforge.net/docs.html.