%% You should probably cite draft-ietf-mip4-generic-notification-message instead of this I-D.
@techreport{deng-mip4-generic-notification-message-02,
    number =    {draft-deng-mip4-generic-notification-message-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-deng-mip4-generic-notification-message/02/},
    author =    {DENG Hui},
    title =     {{Generic Notification Message for Mobile IPv4}},
    pagetotal = 23,
    year =      2006,
    month =     jun,
    day =       26,
    abstract =  {This document specifies protocol enhancements that allow Mobile IPv4 entities to send and receive explicit notification messages using a new Mobile IPv4 type designed for this purpose.},
}