%% You should probably cite draft-ietf-i2nsf-problem-and-use-cases instead of this I-D.
@techreport{hares-i2nsf-merged-problem-use-cases-00,
    number =    {draft-hares-i2nsf-merged-problem-use-cases-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-hares-i2nsf-merged-problem-use-cases/00/},
    author =    {Susan Hares and Linda Dunbar and Antonio Pastor and Diego Lopez and Myo Zarny and Nicolai Leymann and Michael Georgiades and Minpeng Qi and Mohamed Boucadair and Christian Jacquenet and Shaibal Chakrabarty},
    title =     {{I2NSF Problem Statement and Use cases}},
    pagetotal = 23,
    year =      2015,
    month =     dec,
    day =       20,
    abstract =  {This document describes the problem statement for Interface to Network Security Functions (I2NSF) and summary of the I2NSF use cases.},
}