%% You should probably cite rfc6933 instead of this I-D.
@techreport{ietf-eman-rfc4133bis-03,
    number =    {draft-ietf-eman-rfc4133bis-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-eman-rfc4133bis/03/},
    author =    {Andy Bierman and Dan Romascanu and Juergen Quittek and Mouli Chandramouli},
    title =     {{Entity MIB (Version 4)}},
    pagetotal = 70,
    year =      2012,
    month =     oct,
    day =       10,
    abstract =  {This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes managed objects used for managing multiple logical and physical entities managed by a single SNMP agent. This document specifies version of the Entity MIB, which obsoletes version 3 {[}RFC4133{]}.},
}