%% You should probably cite rfc1548 instead of this I-D.
@techreport{ietf-pppext-lcp-main-02,
    number =    {draft-ietf-pppext-lcp-main-02},
    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-lcp-main/02/},
    author =    {William A. Simpson},
    title =     {{The Point-to-Point Protocol (PPP)}},
    pagetotal = 53,
    year =      1993,
    month =     sep,
    day =       7,
    abstract =  {This document defines the PPP organization and methodology, and the PPP encapsulation, together with an extensible option negotiation mechanism which is able to negotiate a rich assortment of configuration parameters and provides additional management functions. {[}STANDARDS-TRACK{]}},
}