%% You should probably cite rfc3361 instead of this I-D.
@techreport{ietf-sip-dhcp-06,
    number =    {draft-ietf-sip-dhcp-06},
    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-sip-dhcp/06/},
    author =    {Henning Schulzrinne},
    title =     {{Dynamic Host Configuration Protocol (DHCP-for-IPv4) Option for Session Initiation Protocol (SIP) Servers}},
    pagetotal = 7,
    year =      2002,
    month =     mar,
    day =       6,
    abstract =  {This document defines a DHCP-for-IPv4 option that contains a list of domain names or IPv4 addresses that can be mapped to one or more SIP outbound proxy servers. This is one of the many methods that a SIP client can use to obtain the addresses of such a local SIP server.},
}