@manual{ctan-metapost,
  title      = {The \texttt{metapost} package},
  subtitle   = {A development of Metafont for creating graphics},
  author     = {{The MetaPost Team} and John Hobby},
  date       = {2021-08-26},
  license    = {lgpl},
  url        = {https://ctan.org/pkg/metapost},
  annotation = {MetaPost uses a language based on that of
       to produce precise
      technical illustrations.  Its output is scalable PostScript or
      SVG, rather than the bitmaps Metafont creates.},
}


@manual{ctan-metaobj,
  title      = {The \texttt{metaobj} package},
  subtitle   = {MetaPost package providing high-level objects},
  author     = {Denis B. Roegel},
  date       = {2016-06-24},
  version    = {0.93},
  license    = {lppl},
  mirror     = {https://mirror.ctan.org/graphics/metapost/contrib/macros/metaobj},
  url        = {https://ctan.org/pkg/metaobj},
}