%% You should probably cite rfc2686 instead of this I-D.
@techreport{ietf-issll-isslow-mcml-06,
    number =    {draft-ietf-issll-isslow-mcml-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-issll-isslow-mcml/06/},
    author =    {Carsten Bormann},
    title =     {{The Multi-Class Extension to Multi-Link PPP}},
    pagetotal = 11,
    year =      1999,
    month =     jun,
    day =       4,
    abstract =  {This document proposes the fragment-oriented solution for the real-time encapsulation format part of the architecture. {[}STANDARDS-TRACK{]}},
}