%% You should probably cite rfc1938 instead of this I-D.
@techreport{haller-otp-04,
    number =    {draft-haller-otp-04},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-haller-otp/04/},
    author =    {Neil M. Haller and Craig Metz},
    title =     {{A One-Time Password System}},
    pagetotal = 18,
    year =      1995,
    month =     oct,
    day =       23,
    abstract =  {This document describes a one-time password authentication system (OTP). {[}STANDARDS-TRACK{]}},
}