%% You should probably cite rfc4523 instead of this I-D.
@techreport{zeilenga-ldap-x509-02,
    number =    {draft-zeilenga-ldap-x509-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-zeilenga-ldap-x509/02/},
    author =    {Kurt Zeilenga},
    title =     {{Lightweight Directory Access Protocol (LDAP) Schema Definitions for X.509 Certificates}},
    pagetotal = 24,
    year =      2005,
    month =     jul,
    day =       19,
    abstract =  {This document describes schema for representing X.509 certificates, X.521 security information, and related elements in directories accessible using the Lightweight Directory Access Protocol (LDAP). The LDAP definitions for these X.509 and X.521 schema elements replace those provided in RFCs 2252 and 2256. {[}STANDARDS-TRACK{]}},
}