%% You should probably cite rfc4618 instead of this I-D.
@techreport{ietf-pwe3-hdlc-ppp-encap-mpls-09,
    number =    {draft-ietf-pwe3-hdlc-ppp-encap-mpls-09},
    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-pwe3-hdlc-ppp-encap-mpls/09/},
    author =    {Andrew G. Malis and Eric C. Rosen and Luca Martini and Giles Heron},
    title =     {{Encapsulation Methods for Transport of PPP/High-Level Data Link Control (HDLC) over MPLS Networks}},
    pagetotal = 16,
    year =      2006,
    month =     may,
    day =       24,
    abstract =  {A pseudowire (PW) can be used to carry Point to Point Protocol (PPP) or High-Level Data Link Control (HDLC) Protocol Data Units over a Multiprotocol Label Switching (MPLS) network without terminating the PPP/HDLC protocol. This enables service providers to offer "emulated" HDLC, or PPP link services over existing MPLS networks. This document specifies the encapsulation of PPP/HDLC Packet Data Units (PDUs) within a pseudowire. {[}STANDARDS-TRACK{]}},
}