%% You should probably cite rfc8697 instead of this I-D.
@techreport{ietf-pce-association-group-04,
    number =    {draft-ietf-pce-association-group-04},
    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-pce-association-group/04/},
    author =    {Ina Minei and Edward Crabbe and Siva Sivabalan and Hariharan Ananthakrishnan and Dhruv Dhody and Yosuke Tanaka},
    title =     {{PCEP Extensions for Establishing Relationships Between Sets of LSPs}},
    pagetotal = 21,
    year =      2017,
    month =     aug,
    day =       1,
    abstract =  {This document introduces a generic mechanism to create a grouping of LSPs in the context of a PCE. This grouping can then be used to define associations between sets of LSPs or between a set of LSPs and a set of attributes (such as configuration parameters or behaviors), and is equally applicable to stateful PCE (active and passive modes) and stateless PCE.},
}