%% You should probably cite rfc8099 instead of this I-D.
@techreport{ietf-ospf-ttz-01,
    number =    {draft-ietf-ospf-ttz-01},
    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-ospf-ttz/01/},
    author =    {Huaimo Chen and Richard Li and Gregory Cauchie and Alvaro Retana and Ning So and Vic Liu and Mehmet Toy and Lei Liu},
    title =     {{OSPF Topology-Transparent Zone}},
    pagetotal = 22,
    year =      2015,
    month =     jul,
    day =       3,
    abstract =  {This document presents a topology-transparent zone in a domain. A topology-transparent zone comprises a group of routers and a number of links connecting these routers. Any router outside of the zone is not aware of the zone. The information about the links and routers inside the zone is not distributed to any router outside of the zone. Any link state change such as a link down inside the zone is not seen by any router outside of the zone.},
}