%% You should probably cite draft-ietf-mpls-bfd-directed instead of this I-D.
@techreport{mirsky-mpls-bfd-directed-04,
    number =    {draft-mirsky-mpls-bfd-directed-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-mirsky-mpls-bfd-directed/04/},
    author =    {Greg Mirsky and Jeff Tantsura and Ilya Varlashkin and Mach Chen},
    title =     {{Bidirectional Forwarding Detection (BFD) Directed Return Path}},
    pagetotal = 10,
    year =      2015,
    month =     aug,
    day =       7,
    abstract =  {Bidirectional Forwarding Detection (BFD) is expected to monitor bi- directional paths. When a BFD session monitors in its forward direction an explicitly routed path there is a need to be able to direct egress BFD peer to use specific path as reverse direction of the BFD session.},
}