%% You should probably cite rfc6951 instead of this I-D.
@techreport{ietf-tsvwg-sctp-udp-encaps-04,
    number =    {draft-ietf-tsvwg-sctp-udp-encaps-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-ietf-tsvwg-sctp-udp-encaps/04/},
    author =    {Michael Tüxen and Randall R. Stewart},
    title =     {{UDP Encapsulation of SCTP Packets}},
    pagetotal = 10,
    year =      2012,
    month =     jul,
    day =       5,
    abstract =  {This document describes a simple method of encapsulating SCTP Packets into UDP packets and its limitations. This allows the usage of SCTP in networks with legacy NAT not supporting SCTP. It can also be used to implement SCTP on hosts without directly accessing the IP-layer, for example implementing it as part of the application without requiring special privileges.},
}