%% You should probably cite rfc8488 instead of this I-D.
@techreport{ietf-sidrops-rpki-tree-validation-01,
    number =    {draft-ietf-sidrops-rpki-tree-validation-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-ietf-sidrops-rpki-tree-validation/01/},
    author =    {Oleg Muravskiy and Tim Bruijnzeels},
    title =     {{RPKI Certificate Tree Validation by the RIPE NCC RPKI Validator}},
    pagetotal = 15,
    year =      2017,
    month =     jul,
    day =       20,
    abstract =  {This document describes the approach to validate the content of the RPKI certificate tree, as it is implemented in the RIPE NCC RPKI Validator. This approach is independent of a particular object retrieval mechanism. This allows it to be used with repositories available over the rsync protocol, the RPKI Repository Delta Protocol, and repositories that use a mix of both.},
}