%% You should probably cite rfc7131 instead of this I-D. @techreport{ietf-sipcore-rfc4244bis-callflows-06, number = {draft-ietf-sipcore-rfc4244bis-callflows-06}, 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-sipcore-rfc4244bis-callflows/06/}, author = {Mary Barnes and Francois Audet and Shida Schubert and Hans Erik van Elburg and Christer Holmberg}, title = {{Session Initiation Protocol (SIP) History-Info Header Call Flow Examples}}, pagetotal = 46, year = 2013, month = jul, day = 15, abstract = {This document describes use cases and documents call flows which require the History-Info header field to capture the Request-URIs as a Session Initiation Protocol (SIP) Request is retargeted. The use cases are described along with the corresponding call flow diagrams and messaging details.}, }