1. International Telecommunications Union Estimated spectrum bandwidth requirements for the future development of IMT-2000 and IMT-Advanced 2006
2. Federal Communications Commission Spectrum policy taskforce report 2002 http://hraunfoss.fcc.gov/edocspublic/attachmatch/DOC-228542A1.pdf
3. A survey of dynamic spectrum access, signal processing, networking, and regulatory policy;Zhao;IEEE Communications Magazine,2007
4. Cognitive medium access control protocols for secondary users sharing a common channel with timedivision multiple access primary users;Hu;Wireless Communication and Mobile Computing,2014
5. Cognitive Radio Networks