%% You should probably cite rfc5094 instead of this I-D.
@techreport{ietf-mip6-vsm-03,
    number =    {draft-ietf-mip6-vsm-03},
    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-mip6-vsm/03/},
    author =    {Alpesh Patel and Kent Leung and Vijay Devarapalli},
    title =     {{Mobile IPv6 Vendor Specific Option}},
    pagetotal = 7,
    year =      2007,
    month =     oct,
    day =       5,
    abstract =  {There is a need for vendor-specific extensions to Mobility Header messages so that Mobile IPv6 vendors are able to extend the protocol for research or deployment purposes. This document defines a new vendor-specific mobility option. {[}STANDARDS-TRACK{]}},
}