%% You should probably cite draft-ietf-pce-entropy-label-position instead of this I-D.
@techreport{peng-pce-entropy-label-position-01,
    number =    {draft-peng-pce-entropy-label-position-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-peng-pce-entropy-label-position/01/},
    author =    {Shaofu Peng and Quan Xiong},
    title =     {{PCEP Extension for SR-MPLS Entropy Label Position}},
    pagetotal = 9,
    year =      2019,
    month =     sep,
    day =       12,
    abstract =  {This document proposes a set of extensions for PCEP to configure the entropy label position for SR-MPLS networks.},
}