%% You should probably cite rfc2543 instead of this I-D. @techreport{ietf-mmusic-sip-12, number = {draft-ietf-mmusic-sip-12}, 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-mmusic-sip/12/}, author = {Henning Schulzrinne and Eve Schooler and Jonathan Rosenberg and Mark J. Handley}, title = {{SIP: Session Initiation Protocol}}, pagetotal = 151, year = 1999, month = jan, day = 18, abstract = {The Session Initiation Protocol (SIP) is an application-layer control (signaling) protocol for creating, modifying and terminating sessions with one or more participants. {[}STANDARDS-TRACK{]}}, }