%% You should probably cite draft-ietf-ccamp-flexible-grid-ospf-ext instead of this I-D.
@techreport{zhang-ccamp-flexible-grid-ospf-ext-04,
    number =    {draft-zhang-ccamp-flexible-grid-ospf-ext-04},
    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/04/},
    author =    {Xian Zhang and Haomian Zheng and Ramon Casellas and Oscar Gonzalez de Dios and Daniele Ceccarelli},
    title =     {{GMPLS OSPF-TE Extensions in support of Flexible Grid}},
    pagetotal = 14,
    year =      2014,
    month =     feb,
    day =       13,
    abstract =  {This memo describes the OSPF-TE extensions in support of GMPLS control of networks that include devices that use the new flexible optical grid.},
}