To cite kmer in publications use:

Wilkinson S (2018). kmer: an R package for fast alignment-free clustering of biological sequences. Wilderlab, Wellington, New Zealand. https://cran.r-project.org/package=kmer.

Corresponding BibTeX entry:

  @Manual{,
    title = {kmer: an R package for fast alignment-free clustering of
      biological sequences},
    author = {Shaun Wilkinson},
    url = {https://cran.r-project.org/package=kmer},
    year = {2018},
    organization = {Wilderlab},
    address = {Wellington, New Zealand},
  }