*Accessível pelo b-On (rede do ISCTE)
*[Chal06] Tung Ching Chiang, et. al.; "Friends Night Out—A Working Prototype of a Blended Lifestyle Service Enabled Through IMS"; Bell Labs Technical Journal, 2006
[CDTo06] P. Carden, E. Darmois, P. Tournassoud; "IMS inside the enterprise"; Alcatel Telecommunications Review, 1st Quarter 2006
[Jin5] Huang Jin; "The evolution of IMS" Communicate, December 2005
*[MaGo06] Th. Magedanz, F. C. de Gouveia; "IMS – the IP Multimedia System as NGN Service Delivery Platform" Elektrotechnik & Informationstechnik, August 2006
*[3GPP TS 23.228] 3GPP; IP Multimedia Subsystem (IMS); 3rd Generation Partnership Project, Technical Specification Group Services and System Aspects; TS 23.228; Sep. 2010 *[3GPP TR 24.930] 3GPP; Signalling flows for the session setup in the IP Multimedia core network Subsystem (IMS) based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP); 3rd Generation Partnership Project, Technical Specification Group Core Network and Terminals; TR 24.930; Dec. 2009