To cite package ‘motifcounter’ in publications use:

  Kopp W (2017). _motifcounter: R package for analysing TFBSs in DNA
  sequences_. doi:10.18129/B9.bioc.motifcounter
  <https://doi.org/10.18129/B9.bioc.motifcounter>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {motifcounter: R package for analysing TFBSs in DNA sequences},
    author = {Wolfgang Kopp},
    year = {2017},
    doi = {10.18129/B9.bioc.motifcounter},
  }