%% You should probably cite draft-ietf-pim-pop-count instead of this I-D.
@techreport{farinacci-pim-pop-count-02,
    number =    {draft-farinacci-pim-pop-count-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-farinacci-pim-pop-count/02/},
    author =    {Dino Farinacci and Greg Shepherd},
    title =     {{Population Count Extensions to PIM}},
    pagetotal = 17,
    year =      2008,
    month =     feb,
    day =       27,
    abstract =  {This specification defines a method for providing multicast distribution-tree accounting data for billing and debugging. Simple extensions to the PIM protocol allow a rough approximation of tree- based data in a scalable fashion.},
}