%% You should probably cite rfc4032 instead of this I-D. @techreport{ietf-sip-rfc3312-update-03, number = {draft-ietf-sip-rfc3312-update-03}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-ietf-sip-rfc3312-update/03/}, author = {Gonzalo Camarillo and Paul Kyzivat}, title = {{Update to the Session Initiation Protocol (SIP) Preconditions Framework}}, pagetotal = 10, year = 2004, month = sep, day = 29, abstract = {This document updates RFC 3312, which defines the framework for preconditions in SIP. We provide guidelines for authors of new precondition types and describe how to use SIP preconditions in situations that involve session mobility. {[}STANDARDS-TRACK{]}}, }