The Integrated Services Digital Network (ISDN) Subaddress Encoding Type for tel URI. - Mayumi Munakata; Shida Schubert; Takumi Ohba (RFC, 2006)

Guidelines for Using the Privacy Mechanism for SIP. - Mayumi Munakata; Shida Schubert; Takumi Ohba (RFC, 2010)

User-Agent-Driven Privacy Mechanism for SIP. - Mayumi Munakata; Shida Schubert; Takumi Ohba (RFC, 2010)

An Extension to the Session Initiation Protocol (SIP) for Request History Information. - Mary Barnes; François Audet; Shida Schubert; Hans Erik van Elburg; Christer Holmberg (RFC, 2014)

Session Initiation Protocol (SIP) History-Info Header Call Flow Examples. - Mary Barnes; François Audet; Shida Schubert; Hans Erik van Elburg; Christer Holmberg (RFC, 2014)

The Session Initiation Protocol (SIP) P-Private-Network-Indication Private Header (P-Header). - Hans Erik van Elburg; Keith Drage; Mayumi Ohsugi; Shida Schubert; Kenjiro Arai (RFC, 2014)