@Manual{R,
    title = {R: A Language and Environment for Statistical Computing},
    author = {{R Core Team}},
    organization = {R Foundation for Statistical Computing},
    address = {Vienna, Austria},
    year = {2018},
    url = {https://www.R-project.org/},
  }
@techreport{murrell-mplib-library-2018,
  title="Building an mplib Shared Library",
  author = {Paul Murrell},
  year={2018},
  note={version 1},
  institution={Department of Statistics, The University of Auckland},
  number={2018-10}
}
  @Manual{pkg:vwline,
    title = {vwline: Draw variable-width lines},
    author = {Paul Murrell},
    year = {2018},
    note = {R package version 0.2-1},
  }

 @Manual{pkg:gridbezier,
    title = {gridBezier: Bezier Curves in grid},
    author = {Paul Murrell},
    year = {2018},
    note = {R package version 1.0-0},
  }


@Article{Hoekwater:TB28-3-317,
  author =       "Taco Hoekwater and Hans Hagen",
  title =        "{MPlib}: {MetaPost} as a reusable component",
  journal =      {{TUGboat}},
  volume =       "28",
  number =       "3",
  pages =        "317--318",
  year =         "2007",
  ISSN =         "0896-3207",
  bibdate =      "Mon May 25 14:17:16 MDT 2015",
  bibsource =    "http://www.math.utah.edu/pub/tex/bib/index-table-t.html#tugboat;
                 http://www.math.utah.edu/pub/tex/bib/tugboat.bib;
                 http://www.tug.org/tug2007/",
  URL =          "http://www.tug.org/TUGboat/tb28-3/tb90hoekwater-mplib.pdf",
  acknowledgement = ack-bnb # " and " # ack-nhfb,
  issue =        "90",
  journal-URL =  "http://www.tug.org/TUGboat/",
  remark =       "TUG 2007 Proceedings (San Diego, California).",
}

@article{metapost-hobby,
author = {Hobby, John},
year = {1998},
month = {08},
title = {{A User's Manual for MetaPost}}
}

@manual{metapost,
title={METAPOST a user’s manual},
author={John D. Hobby and {the MetaPost development team}},
year={2018},
url={http://www.tug.org/docs/metapost/mpman.pdf}
}

@manual{luatex,
title={LuaTeX Reference Manual},
year={2017},
author={{The LuaTeX development team}},
url={http://www.luatex.org/svn/trunk/manual/luatex.pdf}
}

@manual{context,
title={ConTeXt The Manual},
year={2018},
author={Hans Hagen},
url={http://www.pragma-ade.com/general/manuals/cont-eni.pdf}
}
  @Book{pkg:lattice,
    title = {Lattice: Multivariate Data Visualization with R},
    author = {Deepayan Sarkar},
    publisher = {Springer},
    address = {New York},
    year = {2008},
    note = {ISBN 978-0-387-75968-5},
    url = {http://lmdvr.r-forge.r-project.org},
  }
@manual{mplibapi,
  author = {Taco Hoekwater and Luigi Scarso},
  year = {2018},
  title = {MPlib API documentation, version 2.00},
  url = {http://mirror.aut.ac.nz/CTAN/systems/doc/metapost/mplibapi.pdf}
}