1. ITU-R PDNR M.[IMT-VIS (641-E R15)], Preliminary draft new Recommendation (PDNR): Vision framework and overall objectives of the future development of IMT-2000 and of systems beyond IMT-2000, Document 8F/TEMP/316-E (June 4, 2002)
2. Berezdivin, R., Breinig, R., Topp, R.: Next-Generation Wireless Communications Concepts and Technologies. IEEE Communicaions Magazine 40(3), 108–116 (2002)
3. Ryu, S., Oh, D., Shin, G., Han, K., Hwang, S., Park, S.: Research Activities on the Next Generation Mobile Communications and Services in Korea. IEEE Communicaions Magazine 43(9), 122–131 (2005)
4. Arbanowski, S., Ballon, P., David, K., Droegehorn, O., Eertink, H., Kellerer, W., Kranenburg, H., Raatikainen, K., Popescu-Zeletin, R.: I-centric Communications: Personalization, Ambient Awareness, and Adaptability for Future Mobile Services. IEEE Communicaions Magazine 42(10), 63–69 (2004)
5. Bae, J., Ha, J., Yoon, S., Kim, S.: A Ubiquitous Health Care Service Based on Multi-Agent Technology: Art Therapy Service. In: Proceedings of World Telecommunications Congress (October 2004)