To cite package ‘periodicDNA’ in publications use:

  Serizay J (2021). _periodicDNA: Set of tools to identify periodic
  occurrences of k-mers in DNA sequences_. R package version 1.15.0,
  <https://bioconductor.org/packages/periodicDNA>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {periodicDNA: Set of tools to identify periodic occurrences of k-mers in DNA
sequences},
    author = {Jacques Serizay},
    year = {2021},
    note = {R package version 1.15.0},
    url = {https://bioconductor.org/packages/periodicDNA},
  }