%% You should probably cite rfc7761 instead of this I-D.
@techreport{ietf-pim-rfc4601bis-02,
    number =    {draft-ietf-pim-rfc4601bis-02},
    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-pim-rfc4601bis/02/},
    author =    {Bill Fenner (ˢˣˠ) and Mark J. Handley and Hugh Holbrook and Isidor Kouvelas and Rishabh Parekh and Zhaohui (Jeffrey) Zhang and Lianshu Zheng},
    title =     {{Protocol Independent Multicast - Sparse Mode (PIM-SM): Protocol Specification (Revised)}},
    pagetotal = 133,
    year =      2013,
    month =     oct,
    day =       17,
    abstract =  {This document specifies Protocol Independent Multicast - Sparse Mode (PIM-SM). PIM-SM is a multicast routing protocol that can use the underlying unicast routing information base or a separate multicast- capable routing information base. It builds unidirectional shared trees rooted at a Rendezvous Point (RP) per group, and optionally creates shortest-path trees per source. This document addresses errata filed against RFC 4601, and removes the optional (*,*,RP) feature that lacks sufficient deployment experience.},
}