%% You should probably cite rfc1172 instead of this I-D.
@techreport{ietf-ppp-options-03,
    number =    {draft-ietf-ppp-options-03},
    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-ppp-options/03/},
    author =    {Russ Hobby and Drew D. Perkins},
    title =     {{Point-to-Point Protocol (PPP) initial configuration options}},
    pagetotal = 40,
    year =      1990,
    month =     apr,
    day =       11,
    abstract =  {This memo specifies the Point-to-Point Protocol (PPP) Initial Configuration Options as a Proposed Standard Protocol for the Internet community. When it becomes a full Standard, this protocol will be recommended for all TCP/IP implementations that communicate over serial links.},
}