%% You should probably cite draft-xu-lsr-ospf-service-function-adv instead of this I-D.
@techreport{xu-ospf-service-function-adv-01,
    number =    {draft-xu-ospf-service-function-adv-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-xu-ospf-service-function-adv/01/},
    author =    {Xiaohu Xu and Nan Wu and Himanshu C. Shah},
    title =     {{Advertising Service Functions Using OSPF}},
    pagetotal = 5,
    year =      2014,
    month =     jun,
    day =       18,
    abstract =  {The Segment Routing mechanism can be leveraged to realize the service path layer functionality of the Service Function Chaining (i.e, steering traffic through the service function path). This document describes how to advertise service functions and their corresponding characters (e.g.,service function segment ID) using OSPF. Here the OSPF means both OSPFv2 and OSPFv3.},
}