To cite the enhanced vioplot package in publications use:
Adler D, Kelly ST (2020). vioplot: violin plot. R package version 0.3.7, https://github.com/TomKellyGenetics/vioplot.
Please also acknowledge the original package: citation("vioplot")
Corresponding BibTeX entry:
  @Manual{,
    title = {vioplot: violin plot},
    author = {Daniel Adler and S. Thomas Kelly},
    year = {2020},
    note = {R package version 0.3.7},
    url = {https://github.com/TomKellyGenetics/vioplot},
  }