%% You should probably cite rfc6116 instead of this I-D.
@techreport{ietf-enum-3761bis-09,
    number =    {draft-ietf-enum-3761bis-09},
    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-enum-3761bis/09/},
    author =    {Lawrence W. Conroy and Scott O. Bradner and Kazunori Fujiwara},
    title =     {{The E.164 to Uniform Resource Identifiers (URI) Dynamic Delegation Discovery System (DDDS) Application (ENUM)}},
    pagetotal = 22,
    year =      2010,
    month =     jun,
    day =       23,
    abstract =  {This document discusses the use of the Domain Name System (DNS) for storage of data associated with E.164 numbers, and for resolving those numbers into URIs that can be used (for example) in telephony call setup. This document also describes how the DNS can be used to identify the services associated with an E.164 number. This document obsoletes RFC 3761. {[}STANDARDS-TRACK{]}},
}