%% You should probably cite draft-ietf-clue-protocol instead of this I-D.
@techreport{presta-clue-protocol-01,
    number =    {draft-presta-clue-protocol-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-presta-clue-protocol/01/},
    author =    {Roberta Presta and Simon Pietro Romano},
    title =     {{CLUE protocol}},
    pagetotal = 17,
    year =      2013,
    month =     sep,
    day =       17,
    abstract =  {ToDo.},
}