%% You should probably cite rfc4006 instead of this I-D.
@techreport{ietf-aaa-diameter-cc-06,
    number =    {draft-ietf-aaa-diameter-cc-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-aaa-diameter-cc/06/},
    author =    {Juha-Pekka Koskinen and Leena Mattila and Marco Stura and John A. Loughney and Harri Hakala},
    title =     {{Diameter Credit-Control Application}},
    pagetotal = 114,
    year =      2004,
    month =     aug,
    day =       13,
    abstract =  {This document specifies a Diameter application that can be used to implement real-time credit-control for a variety of end user services such as network access, Session Initiation Protocol (SIP) services, messaging services, and download services. {[}STANDARDS-TRACK{]}},
}