%% You should probably cite draft-ietf-ccamp-gmpls-general-constraints-ospf-te instead of this I-D.
@techreport{zhang-ccamp-general-constraints-ospf-ext-00,
    number =    {draft-zhang-ccamp-general-constraints-ospf-ext-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-zhang-ccamp-general-constraints-ospf-ext/00/},
    author =    {Fatai Zhang and Young Lee and Jianrui Han and Greg M. Bernstein and Yunbin Xu and Guoying Zhang and Dan Li and Ming Chen and Yabin Ye},
    title =     {{OSPF-TE Extensions for General Network Element Constraints}},
    pagetotal = 13,
    year =      2010,
    month =     sep,
    day =       10,
    abstract =  {Generalized Multiprotocol Label Switching can be used to control a wide variety of technologies including packet switching (e.g., MPLS), time-division (e.g., SONET/SDH, OTN), wavelength (lambdas), and \textless{}Zhang\textgreater{} Expires March 2011 {[}page 1{]} draft-zhang-ccamp-general-constraints-ospf-ext-00.txt September 2010 spatial switching (e.g., incoming port or fiber to outgoing port or fiber). In some of these technologies network elements and links may impose additional routing constraints such as asymmetric switch connectivity, non-local label assignment, and label range limitations on links. This document describes OSPF routing protocol extensions to support these kinds of constraints under the control of Generalized MPLS (GMPLS).},
}