%% You should probably cite draft-liu-sfc-use-cases instead of this I-D.
@techreport{liu-service-chaining-use-cases-02,
    number =    {draft-liu-service-chaining-use-cases-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-liu-service-chaining-use-cases/02/},
    author =    {Will (Shucheng) LIU and Hongyu Li and Oliver Huang and Mohamed Boucadair and Nicolai Leymann and Zhen Cao and Jie Hu},
    title =     {{Service Function Chaining Use Cases}},
    pagetotal = 14,
    year =      2013,
    month =     sep,
    day =       24,
    abstract =  {The delivery of value-added services relies on the invocation of advanced Service Functions in a sequential order. This mechanism is called Service Function Chaining (SFC). The set of involved Service Functions and their order depends on the service context. This document presents a set of use cases of Service Function Chaining (SFC).},
}