%% You should probably cite rfc6956 instead of this I-D.
@techreport{ietf-forces-lfb-lib-07,
    number =    {draft-ietf-forces-lfb-lib-07},
    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-forces-lfb-lib/07/},
    author =    {Chuanhuang Li and Evangelos Haleplidis and Joel M. Halpern and Kentaro Ogawa and Weiming Wang},
    title =     {{ForCES Logical Function Block (LFB) Library}},
    pagetotal = 103,
    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 defines basic classes of Logical Function Blocks (LFBs) used in the Forwarding and Control Element Separation (ForCES). The basic LFB classes are defined according to ForCES FE model and ForCES protocol specifications, and are scoped to meet requirements of typical router functions and considered as the basic LFB library for ForCES. The library includes the descriptions of the LFBs and the XML definitions.},
}