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)

Dual mode service: Learning from integrating an IP multimedia subsystem service into existing live networks. - Luay Ho Tahat; Erik E. Anderlind; Ashok P. Shah; Anthony J. Wycklendt; Edward A. Clark; Dupyo Choi (Bell Labs Tech. J., 2007)