%% You should probably cite rfc2419 instead of this I-D.
@techreport{ietf-pppext-des-encrypt-v2-02,
    number =    {draft-ietf-pppext-des-encrypt-v2-02},
    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-des-encrypt-v2/02/},
    author =    {Dr. Gerry Meyer and Keith L. Sklower},
    title =     {{The PPP DES Encryption Protocol, Version 2 (DESE-bis)}},
    pagetotal = 12,
    year =      1998,
    month =     mar,
    day =       18,
    abstract =  {This document provides specific details for the use of the DES standard for encrypting PPP encapsulated packets. {[}STANDARDS-TRACK{]}},
}