Improved IP Multimedia Subsystem authentication mechanism for 3G-WLAN networks. - Madhu J. Sharma; Victor C. M. Leung (Int. J. Secur. Networks, 2011)

IP Multimedia subsystem authentication protocol in LTE-heterogeneous networks. - Madhu J. Sharma; Victor C. M. Leung (Hum. centric Comput. Inf. Sci., 2012)