%% You should probably cite rfc8623 instead of this I-D.
@techreport{ietf-pce-stateful-pce-p2mp-13,
    number =    {draft-ietf-pce-stateful-pce-p2mp-13},
    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-stateful-pce-p2mp/13/},
    author =    {Udayasree Palle and Dhruv Dhody and Yosuke Tanaka and Vishnu Pavan Beeram},
    title =     {{Stateful Path Computation Element (PCE) Protocol Extensions for Usage with Point-to-Multipoint TE Label Switched Paths (LSPs)}},
    pagetotal = 33,
    year =      2019,
    month =     apr,
    day =       11,
    abstract =  {The Path Computation Element (PCE) has been identified as an appropriate technology for the determination of the paths of point- to-multipoint (P2MP) TE Label Switched Paths (LSPs). This document provides extensions required for the Path Computation Element Communication Protocol (PCEP) so as to enable the usage of a stateful PCE capability in supporting P2MP TE LSPs.},
}