H. Schulzrinne

Session Initiation Protocol (SIP) Extension for Instant Messaging

D. Gurle, C. Huitema, Ben Campbell, 2002, RFC.

Common Gateway Interface for SIP

Jonathan Lennox, Jonathan D. Rosenberg, H. Schulzrinne, 2001, RFC.

Best Current Practices for Third Party Call Control (3pcc) in the Session Initiation Protocol (SIP)

Henning Schulzrinne, Jon Peterson, Gonzalo Camarillo, 2004, RFC.

A Session Initiation Protocol (SIP) Load-Control Event Package

Henning Schulzrinne, Arata Koike, Charles Shen, 2014 .

A Session Initiation Protocol (SIP) Load-Control Event Package

H. Schulzrinne, Charles Shen, Arata Koike, 2014, RFC.