To cite CountsEPPM in publications use:

David M. Smith, Malcolm J. Faddy (2016). Mean and Variance Modeling of Under- and Overdispersed Count Data. Journal of Statistical Software, 69(6), 1-23.<doi:10.18637/jss.v069.i06>

Corresponding BibTeX entry:

  @Article{,
    title = {Mean and Variance Modeling of Under- and Overdispersed
      Count Data},
    author = {David M. Smith and Malcolm J. Faddy},
    journal = {Journal of Statistical Software},
    year = {2016},
    volume = {69},
    number = {6},
    pages = {1--23},
    doi = {10.18637/jss.v069.i06},
  }