The Flexent® packet core access platform for CDMA2000* packet data. - Christopher J. Davolos; Subhasis Laha; Stinson S. Mathai; Albert J. Sawyer; Jin Wang (Bell Labs Tech. J., 2002)

Aspects of network security for VoIP solutions using IMS core network and Wi-Fi access. - Ruth S. Gayde; Stinson S. Mathai; Kevin Wang (Bell Labs Tech. J., 2007)