%% You should probably cite draft-ietf-lsr-isis-ttz instead of this I-D.
@techreport{chen-isis-ttz-07,
    number =    {draft-chen-isis-ttz-07},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-chen-isis-ttz/07/},
    author =    {Huaimo Chen and Alvaro Retana and Richard Li and Ning So and Vic Liu and Mehmet Toy and Lei Liu},
    title =     {{Topology-Transparent Zone}},
    pagetotal = 22,
    year =      ,
    month =     ,
    day =       ,
    abstract =  {This document presents a topology-transparent zone in an area. A zone is a block/piece of an area, which comprises a group of routers and a number of circuits connecting them. It is abstracted as a virtual entity such as a single pseudo node or zone edges mess. Any router outside of the zone is not aware of the zone. The information about the circuits and routers inside the zone is not distributed to any router outside of the zone.},
}