@misc{rfc2117,
    series =    {Request for Comments},
    number =    2117,
    howpublished =  {RFC 2117},
    publisher = {RFC Editor},
    doi =       {10.17487/RFC2117},
    url =       {https://www.rfc-editor.org/info/rfc2117},
    author =    {Dr. Steve E. Deering and Dr. Deborah Estrin and Ching-Gung Liu and Liming Wei and Puneet Sharma and Dave Thaler and Mark J. Handley and Ahmed Helmy and Van Jacobson and Dino Farinacci},
    title =     {{Protocol Independent Multicast-Sparse Mode (PIM-SM): Protocol Specification}},
    pagetotal = 66,
    year =      1997,
    month =     jun,
    abstract =  {This document describes a protocol for efficiently routing to multicast groups that may span wide-area (and inter-domain) internets. This memo defines an Experimental Protocol for the Internet community.},
}