%% You should probably cite draft-ietf-tram-stun-pmtud instead of this I-D.
@techreport{petithuguenin-tram-stun-pmtud-00,
    number =    {draft-petithuguenin-tram-stun-pmtud-00},
    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/00/},
    author =    {Marc Petit-Huguenin},
    title =     {{Path MTU Discovery Using Session Traversal Utilities for NAT (STUN)}},
    pagetotal = 10,
    year =      2015,
    month =     jan,
    day =       5,
    abstract =  {This document describes a Session Traversal Utilities for NAT (STUN) usage for discovering the path MTU between a client and a server.},
}