%% You should probably cite rfc8528 instead of this I-D.
@techreport{ietf-netmod-schema-mount-09,
    number =    {draft-ietf-netmod-schema-mount-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-schema-mount/09/},
    author =    {Martin Björklund and Ladislav Lhotka},
    title =     {{YANG Schema Mount}},
    pagetotal = 26,
    year =      2018,
    month =     mar,
    day =       20,
    abstract =  {This document defines a mechanism to combine YANG modules into the schema defined in other YANG modules.},
}