%% You should probably cite draft-york-dispatch-p-charge-info instead of this I-D. @techreport{york-sipping-p-charge-info-13, number = {draft-york-sipping-p-charge-info-13}, type = {Internet-Draft}, institution = {Internet Engineering Task Force}, publisher = {Internet Engineering Task Force}, note = {Work in Progress}, url = {https://datatracker.ietf.org/doc/draft-york-sipping-p-charge-info/13/}, author = {Dan York and Tolga Asveren}, title = {{P-Charge-Info - A Private Header (P-Header) Extension to the Session Initiation Protocol (SIP)}}, pagetotal = 14, year = 2012, month = apr, day = 3, abstract = {This document describes 'P-Charge-Info', a private Session Initiation Protocol (SIP) header (P-header) used to convey billing information about the party to be charged. This P-Header is currently in production usage by a number of equipment vendors and carriers and this document is submitted to request the registration of this header with IANA. This P-Header may also be used in some situations to carry the ISUP Charge Number parameter for PSTN interconnection.}, }