Alexander Vießmann Admir Burnic Christoph Spiegel Guido Horst Bruck Peter Jung Fundamental Concepts for Petri Net based Cognitive Radio Evaluation. 1-6 2007 ISCC http://dx.doi.org/10.1109/ISCC.2007.4381505 conf/iscc/2007 db/conf/iscc/iscc2007.html#ViessmannBSBJ07