Indicating User Agent Capabilities in the Session Initiation Protocol (SIP). - Jonathan D. Rosenberg; Henning Schulzrinne; Paul Kyzivat (RFC, 2004)

Caller Preferences for the Session Initiation Protocol (SIP). - Jonathan D. Rosenberg; Henning Schulzrinne; Paul Kyzivat (RFC, 2004)

Update to the Session Initiation Protocol (SIP) Preconditions Framework. - Gonzalo Camarillo; Paul Kyzivat (RFC, 2005)

RPID: Rich Presence Extensions to the Presence Information Data Format (PIDF). - Henning Schulzrinne; Vijay K. Gurbani; Paul Kyzivat; Jonathan D. Rosenberg (RFC, 2006)

Guidelines for Usage of the Session Initiation Protocol (SIP) Caller Preferences Extension. - Jonathan D. Rosenberg; Paul Kyzivat (RFC, 2006)

Example Call Flows of Race Conditions in the Session Initiation Protocol (SIP). - Miki Hasebe; Jun Koshiko; Yasushi Suzuki; Tomoyuki Yoshikawa; Paul H. Kyzivat (RFC, 2008)

A Session Description Protocol (SDP) Offer/Answer Mechanism to Enable File Transfer. - Miguel A. Garcia-Martin; Markus Isomäki; Gonzalo Camarillo; Salvatore Loreto; Paul H. Kyzivat (RFC, 2009)

Registration Event Package Extension for Session Initiation Protocol (SIP) Globally Routable User Agent URIs (GRUUs). - Paul H. Kyzivat (RFC, 2009)

Session Initiation Protocol (SIP) Usage of the Offer/Answer Model. - Shunsuke Okumura; Takuya Sawada; Paul H. Kyzivat (RFC, 2011)

Case-Sensitive String Support in ABNF. - Paul Kyzivat (RFC, 2014)

URNs for the Alert-Info Header Field of the Session Initiation Protocol (SIP). - Laura Liess; Roland Jesske; Alan B. Johnston; Dale R. Worley; Paul Kyzivat (RFC, 2015)

Session Initiation Protocol (SIP) Recording Metadata. - Ram Mohan Ravindranath; Parthasarathi Ravindran; Paul Kyzivat (RFC, 2016)

Session Initiation Protocol (SIP) Recording Call Flows. - Ram Mohan Ravindranath; Parthasarathi Ravindran; Paul Kyzivat (RFC, 2017)

Session Signaling for Controlling Multiple Streams for Telepresence (CLUE). - Robert Hanton; Paul Kyzivat; Lennard Xiao; Christian Groves (RFC, 2021)

SDP: Session Description Protocol. - Ali C. Begen; Paul Kyzivat; Colin Perkins; Mark Handley (RFC, 2021)