%% You should probably cite rfc8496 instead of this I-D.
@techreport{york-p-charge-info-02,
    number =    {draft-york-p-charge-info-02},
    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-p-charge-info/02/},
    author =    {Dan York and Tolga Asveren},
    title =     {{P-Charge-Info - A Private Header (P-Header) Extension to the Session Initiation Protocol (SIP)}},
    pagetotal = 13,
    year =      2018,
    month =     feb,
    day =       2,
    abstract =  {This text documents the current usage of'P-Charge-Info', an existing private Session Initiation Protocol (SIP) header (P-header) used to convey billing information about the party to be charged. This P-Header is currently used in production by several equipment vendors and carriers. This document is submitted to request the registration of this header with IANA. NOTE: This document is a slimmed-down version of the document previously known as 'draft-york-dispatch-p-charge-info'.},
}