%% You should probably cite rfc6021 instead of this I-D.
@techreport{ietf-netmod-yang-types-09,
    number =    {draft-ietf-netmod-yang-types-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-netmod-yang-types/09/},
    author =    {Jürgen Schönwälder},
    title =     {{Common YANG Data Types}},
    pagetotal = 26,
    year =      2010,
    month =     apr,
    day =       26,
    abstract =  {This document introduces a collection of common data types to be used with the YANG data modeling language. {[}STANDARDS-TRACK{]}},
}