%% You should probably cite rfc7904 instead of this I-D.
@techreport{ietf-p2psip-sip-21,
    number =    {draft-ietf-p2psip-sip-21},
    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-p2psip-sip/21/},
    author =    {Cullen Fluffy Jennings and Bruce Lowekamp and Eric Rescorla and Salman Baset and Henning Schulzrinne and Thomas C. Schmidt},
    title =     {{A SIP Usage for REsource LOcation And Discovery (RELOAD)}},
    pagetotal = 20,
    year =      2016,
    month =     apr,
    day =       27,
    abstract =  {This document defines a SIP Usage for REsource LOcation And Discovery (RELOAD). The SIP Usage provides the functionality of a SIP proxy or registrar in a fully distributed system and includes a lookup service for Address of Records (AORs) stored in the overlay. It also defines Globally Routable User Agent URIs (GRUUs) that allow the registrations to map an AOR to a specific node reachable through the overlay. After such initial contact of a Peer, the RELOAD AppAttach method is used to establish a direct connection between nodes through which SIP messages are exchanged.},
}