%% You should probably cite rfc1663 instead of this I-D.
@techreport{ietf-pppext-reliable-00,
    number =    {draft-ietf-pppext-reliable-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-ietf-pppext-reliable/00/},
    author =    {David Rand},
    title =     {{PPP Reliable Transmission}},
    pagetotal = 8,
    year =      1993,
    month =     oct,
    day =       6,
    abstract =  {This document defines a method for negotiating and using Numbered-Mode, as defined by ISO 7776 {[}2{]}, to provide a reliable serial link. {[}STANDARDS-TRACK{]}},
}