1. ITU-R Report M.2225: Introduction to cognitive radio systems in the land mobile service (2011)
2. ITU-R Report M.2242: Cognitive radio systems specific for international mobile telecommunications systems (2011)
3. ITU-R Report M.2134: Requirements related to technical performance for IMT-advanced radio interface(s) (2008)
4. ETSI TR 102 802: Reconfigurable Radio Systems (RRS); Cognitive Radio System Concept.
http://www.etsi.org
5. ETSI TR 102 907: Reconfigurable Radio Systems (RRS); use cases for operation in white space frequency bands.
http://www.etsi.org