U Columbia

SIP Caller Preferences and Callee Capabilities

U Columbia, U. Columbia, 1999 .

Internet Telephony Architecture Roadmap

Henning Schulzrinne, U Columbia, H. Schulzrinne, 2002 .

RPIDS - Rich Presence Information Data Format for Presence Based on the Session Initiation Protocol (SIP)

U Columbia, 2003 .

Wayfinding in a Virtual Environment

Kellogg S. Booth, Colin Ware, Brian Fisher, 2000 .