%% You should probably cite rfc7110 instead of this I-D.
@techreport{ietf-mpls-return-path-specified-lsp-ping-14,
    number =    {draft-ietf-mpls-return-path-specified-lsp-ping-14},
    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-mpls-return-path-specified-lsp-ping/14/},
    author =    {Mach Chen and Wei Cao and Ning So and Frederic JOUNAY and Simon DeLord},
    title =     {{Return Path Specified LSP Ping}},
    pagetotal = 19,
    year =      2013,
    month =     oct,
    day =       17,
    abstract =  {This document defines extensions to the data-plane failure-detection protocol for Multiprotocol Label Switching (MPLS) Label Switched Paths (LSPs) known as "LSP Ping". These extensions allow selection of the LSP to use for the echo reply return path. Enforcing a specific return path can be used to verify bidirectional connectivity and also increase LSP ping robustness.},
}