%% You should probably cite rfc8192 instead of this I-D.
@techreport{ietf-i2nsf-problem-and-use-cases-16,
    number =    {draft-ietf-i2nsf-problem-and-use-cases-16},
    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-i2nsf-problem-and-use-cases/16/},
    author =    {Susan Hares and Diego Lopez and Myo Zarny and Christian Jacquenet and Rakesh Kumar and Jaehoon Paul Jeong},
    title =     {{Interface to Network Security Functions (I2NSF): Problem Statement and Use Cases}},
    pagetotal = 29,
    year =      2017,
    month =     may,
    day =       10,
    abstract =  {This document sets out the problem statement for Interface to Network Security Functions (I2NSF) and outlines some companion use cases.},
}