%% You should probably cite draft-ietf-anima-constrained-voucher instead of this I-D.
@techreport{richardson-anima-ace-constrained-voucher-01,
    number =    {draft-richardson-anima-ace-constrained-voucher-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-richardson-anima-ace-constrained-voucher/01/},
    author =    {Michael Richardson},
    title =     {{Constrained Voucher Profile for Bootstrapping Protocols}},
    pagetotal = 13,
    year =      2017,
    month =     dec,
    day =       12,
    abstract =  {This document defines a strategy to securely assign a pledge to an owner, using an artifact signed, directly or indirectly, by the pledge's manufacturer. This artifact is known as a "voucher". This document builds upon the work in {[}I-D.ietf-anima-voucher{]}, encoding the resulting artifact in CBOR. Use with two signature technologies are described. Additionally, this document explains how constrained vouchers may be transported in the {[}I-D.vanderstok-ace-coap-est{]} protocol.},
}