%% You should probably cite draft-ietf-ccamp-flexible-grid-ospf-ext instead of this I-D.
@techreport{zhang-ccamp-flexible-grid-ospf-ext-01,
    number =    {draft-zhang-ccamp-flexible-grid-ospf-ext-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-zhang-ccamp-flexible-grid-ospf-ext/01/},
    author =    {Fatai Zhang and Xian Zhang and Ramon Casellas and Oscar Gonzalez de Dios and Daniele Ceccarelli},
    title =     {{GMPLS OSPF-TE Extensions in support of Flexible Grid in DWDM Networks}},
    pagetotal = 14,
    year =      2012,
    month =     mar,
    day =       12,
    abstract =  {This memo describes the OSPF-TE extensions in support of GMPLS control for flexi-grid in DWDM networks.},
}