%% You should probably cite rfc7510 instead of this I-D.
@techreport{ietf-mpls-in-udp-09,
    number =    {draft-ietf-mpls-in-udp-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-mpls-in-udp/09/},
    author =    {Xiaohu Xu and Nischal Sheth and Lucy Yong and Ross Callon and David L. Black},
    title =     {{Encapsulating MPLS in UDP}},
    pagetotal = 17,
    year =      2014,
    month =     dec,
    day =       19,
    abstract =  {This document specifies an IP-based encapsulation for MPLS, called MPLS-in-UDP (User Datagram Protocol) for situations where UDP encapsulation is preferred to direct use of MPLS, e.g., to enable UDP-based ECMP (Equal Cost Multi-Pathing) or link aggregation. MPLS- in-UDP is primarily applicable to service provider networks, and additional restrictions apply to MPLS-in-UDP usage for traffic that is not congestion controlled and to UDP zero checksum usage with IPv6.},
}