methrix can be cited as:

  Anand Mayakonda, Maximilian Schonung, Joschka Hey1, Rajbir Nath
  Batra, Clarissa Feuerstein-Akgoz1, Kristin Kohler, Daniel B. Lipka,
  Rocio Sotillo, Christoph Plass, Pavlo Lutsik and Reka Toth. 2020.
  Methrix: an R/Bioconductor package for systematic aggregation and
  analysis of bisulfite sequencing data. Bioinformatics.
  https://doi.org/10.1093/bioinformatics/btaa1048

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Methrix: an R/Bioconductor package for systematic aggregation and analysis of bisulfite sequencing data},
    author = {Anand Mayakonda and Maximilian Schonung and Joschka Hey and Rajbir Nath Batra1 and Clarissa Feuerstein-Akgoz and Kristin Kohler and Daniel B. Lipka and Rocio Sotillo and Christoph Plass and Pavlo Lutsik and Reka Toth},
    journal = {Bioinformatics},
    year = {2020},
    doi = {https://doi.org/10.1093/bioinformatics/btaa1048},
  }