%% You should probably cite rfc5937 instead of this I-D.
@techreport{wallace-using-ta-constraints-02,
    number =    {draft-wallace-using-ta-constraints-02},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-wallace-using-ta-constraints/02/},
    author =    {Sam Ashmore and Carl Wallace},
    title =     {{Using Trust Anchor Constraints during Certification Path Processing}},
    pagetotal = 8,
    year =      2010,
    month =     mar,
    day =       3,
    abstract =  {This document describes how to use information associated with a trust anchor public key when validating certification paths. This information can be used to constrain the usage of a trust anchor. Typically, constraints are used to limit the certificate policies and names that can appear in certification paths validated using a trust anchor. This document is not an Internet Standards Track specification; it is published for informational purposes.},
}