%% You should probably cite rfc7563 instead of this I-D.
@techreport{ietf-netext-ani-location-04,
    number =    {draft-ietf-netext-ani-location-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-netext-ani-location/04/},
    author =    {Rajesh Pazhyannur and Sebastian Speicher and Sri Gundavelli and Jouni Korhonen and John Kaippallimalil},
    title =     {{Extensions to the PMIPv6 Access Network Identifier Option}},
    pagetotal = 12,
    year =      2014,
    month =     nov,
    day =       10,
    abstract =  {Access Network Identifier (ANI) Mobility option was introduced in Access Network Identifier Option for Proxy Mobile IPv6 (RFC 6757). This enables a Mobility Access Gateway (MAG) to convey identifiers like network identifier, geolocation, and operator identifier. This specification extends the Access Network Identifier mobility option with sub-options to carry civic location and MAG group Identifier. This specification also defines a ANI Update timer sub-option that determines when and how often the ANI option will be updated.},
}