%% You should probably cite draft-ietf-tram-stun-pmtud instead of this I-D.
@techreport{petithuguenin-tram-stun-pmtud-01,
    number =    {draft-petithuguenin-tram-stun-pmtud-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-petithuguenin-tram-stun-pmtud/01/},
    author =    {Marc Petit-Huguenin and Gonzalo Salgueiro},
    title =     {{Path MTU Discovery Using Session Traversal Utilities for NAT (STUN)}},
    pagetotal = 11,
    year =      2015,
    month =     jul,
    day =       6,
    abstract =  {This document describes a Session Traversal Utilities for NAT (STUN) usage for Path MTU Discovery (PMTUD) between a client and a server.},
}