%% You should probably cite draft-ietf-lsr-isis-ttz instead of this I-D.
@techreport{chen-isis-ttz-00,
    number =    {draft-chen-isis-ttz-00},
    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/00/},
    author =    {Huaimo Chen and Richard Li and Gregory Cauchie and Ning So and Alvaro Retana},
    title =     {{IS-IS Topology-Transparent Zone}},
    pagetotal = 19,
    year =      2013,
    month =     feb,
    day =       18,
    abstract =  {This document presents a topology-transparent zone in a domain. A topology-transparent zone comprises a group of routers and a number of circuits connecting these routers. 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. Any link state change such as a circuit down inside the zone is not seen by any router outside of the zone.},
}