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2. Notice of Proposed Rulemaking on Facilitating Opportunities for Cognitive Radio Technologies, FCC ET Docket No. 03–108, December 2003.
3. Notice of Inquiry and Notice of Proposed Rulemaking for Establishment of an Interference Metric, FCC ET Docket No. 03–237, November 2003.
4. Cognitive Radio: Brain-Empowered Wireless Communications;Haykin;IEEE Journal on Selected Areas in Communication,2005
5. Cognitive Radio: A Communications Engineering Perspective;Jondral;IEEE Wireless Communication,2007