%% You should probably cite rfc4906 instead of this I-D.
@techreport{martini-l2circuit-trans-mpls-19,
    number =    {draft-martini-l2circuit-trans-mpls-19},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-martini-l2circuit-trans-mpls/19/},
    author =    {Nasser El-Aawar and Luca Martini and Eric C. Rosen},
    title =     {{Transport of Layer 2 Frames Over MPLS}},
    pagetotal = 22,
    year =      2006,
    month =     sep,
    day =       8,
    abstract =  {This document describes methods for transporting the Protocol Data Units (PDUs) of layer 2 protocols such as Frame Relay, Asynchronous Transfer Mode (ATM) Adaption Layer 5 (AAL5), and Ethernet, and for providing a Synchronized Optical Network (SONET) circuit emulation service across an MPLS network. This document describes the so-called "draft-martini" protocol, which has since been superseded by the Pseudowire Emulation Edge to Edge Working Group specifications described in RFC 4447 and related documents. This memo defines a Historic Document for the Internet community.},
}