%% You should probably cite rfc7402 instead of this I-D.
@techreport{ietf-hip-rfc5202-bis-04,
    number =    {draft-ietf-hip-rfc5202-bis-04},
    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-hip-rfc5202-bis/04/},
    author =    {Petri Jokela and Robert Moskowitz and Jan Melen},
    title =     {{Using the Encapsulating Security Payload (ESP) Transport Format with the Host Identity Protocol (HIP)}},
    pagetotal = 37,
    year =      2013,
    month =     sep,
    day =       6,
    abstract =  {This memo specifies an Encapsulated Security Payload (ESP) based mechanism for transmission of user data packets, to be used with the Host Identity Protocol (HIP). This document obsoletes RFC 5202.},
}