%% You should probably cite rfc8911 instead of this I-D.
@techreport{ietf-ippm-metric-registry-18,
    number =    {draft-ietf-ippm-metric-registry-18},
    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-ippm-metric-registry/18/},
    author =    {Marcelo Bagnulo and Benoît Claise and Philip Eardley and Al Morton and Aamer Akhter},
    title =     {{Registry for Performance Metrics}},
    pagetotal = 34,
    year =      2019,
    month =     mar,
    day =       11,
    abstract =  {This document defines the format for the IANA Performance Metrics Registry. This document also gives a set of guidelines for Registered Performance Metric requesters and reviewers.},
}