%% You should probably cite draft-ietf-mpls-in-udp instead of this I-D.
@techreport{xu-mpls-in-udp-04,
    number =    {draft-xu-mpls-in-udp-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-xu-mpls-in-udp/04/},
    author =    {Xiaohu Xu and Nischal Sheth and Lucy Yong and Zhenbin Li and Fan Yongbing},
    title =     {{Encapsulating MPLS in UDP}},
    pagetotal = 8,
    year =      2012,
    month =     dec,
    day =       3,
    abstract =  {Existing technologies to encapsulate MPLS over IP are not adequate for efficient load balancing across IP networks. This document specifies additional IP-based encapsulation technology, referred to as MPLS-in-UDP, which can facilitate the load balancing of MPLS application traffic, such as L2VPN and L3VPN traffic, across IP networks.},
}