Wireless voice-over-IP and implications for third-generation network design. - Jin Wang; Peter J. McCann; Patvardhana B. Gorrepati; Chung-Zin Liu (Bell Labs Tech. J., 1998)

SIP-based services architecture across wireless and wireline access. - Chung-Zin Liu; Bill Bushnell; Jim Freeburg; Tod Sizer; Michael C. Recchione; Tom Anderson (Bell Labs Tech. J., 2004)

Transition to IPv6 and support for IPv4/IPv6 interoperability in IMS. - Dupyo Choi; Christine Fischer; Anne Y. Lee; E-Ling Lou; Chung-Zin Liu; Hsien-Chuen Yu (Bell Labs Tech. J., 2006)