%% You should probably cite rfc2848 instead of this I-D.
@techreport{ietf-pint-protocol-03,
    number =    {draft-ietf-pint-protocol-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-pint-protocol/03/},
    author =    {Lawrence W. Conroy and Dr. Scott Petrack},
    title =     {{The PINT Service Protocol: Extensions to SIP and SDP for IP Access to Telephone Call Services}},
    pagetotal = 73,
    year =      2000,
    month =     feb,
    day =       18,
    abstract =  {This document contains the specification of the PINT Service Protocol 1.0, which defines a protocol for invoking certain telephone services from an IP network. {[}STANDARDS-TRACK{]}},
}