%% You should probably cite rfc1331 instead of this I-D.
@techreport{ietf-pppext-lcp-02,
    number =    {draft-ietf-pppext-lcp-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/02/},
    author =    {William A. Simpson},
    title =     {{The Point-to-Point Protocol (PPP) for the Transmission of Multi-protocol Datagrams over Point-to-Point Links}},
    pagetotal = 69,
    year =      1992,
    month =     feb,
    day =       26,
    abstract =  {This document defines the PPP encapsulation scheme, together with the PPP Link Control Protocol (LCP), an extensible option negotiation protocol which is able to negotiate a rich assortment of configuration parameters and provides additional management functions. {[}STANDARDS-TRACK{]}},
}