%% You should probably cite draft-ietf-aaa-diameter-cc instead of this I-D.
@techreport{hakala-aaa-diameter-cc-00,
    number =    {draft-hakala-aaa-diameter-cc-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-hakala-aaa-diameter-cc/00/},
    author =    {Harri Hakala},
    title =     {{Diameter Credit-control Application 
}},
    pagetotal = 38,
    year =      2003,
    month =     may,
    day =       6,
    abstract =  {This document specifies a Diameter application that is used for real- time cost and credit-control between a service element and a credit- control server in a service environment. Diameter accounting messages using additional AVPs defined in the document are used to transfer service and credit-control information between the service element and the credit-control server.},
}