%% You should probably cite draft-ietf-ccamp-optical-impairment-topology-yang instead of this I-D.
@techreport{lee-ccamp-optical-impairment-topology-yang-00,
    number =    {draft-lee-ccamp-optical-impairment-topology-yang-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-lee-ccamp-optical-impairment-topology-yang/00/},
    author =    {Young Lee and Haomian Zheng and Nicola Sambo and Victor Lopez and Gabriele Galimberti},
    title =     {{A Yang Data Model for Optical Impairment-aware Topology}},
    pagetotal = 22,
    year =      ** No value found for 'doc.pub_date.year' **,
    month =     ** No value found for 'doc.pub_date' **,
    day =       ** No value found for 'doc.pub_date.day' **,
    abstract =  {This document provides a YANG data model for the impairment-aware TE topology in optical networks.},
}