To cite ptmixed in publications use:

Signorelli M, Spitali P, Tsonaka R (2020). “Poisson-Tweedie mixed-effects model: a flexible approach for the analysis of longitudinal RNA-seq data.” Statistical Modelling. https://doi.org/10.1177/1471082X20936017.

Corresponding BibTeX entry:

  @Article{,
    title = {Poisson-Tweedie mixed-effects model: a flexible approach
      for the analysis of longitudinal RNA-seq data},
    author = {M. Signorelli and P. Spitali and R. Tsonaka},
    journal = {Statistical Modelling},
    year = {2020},
    url = {https://doi.org/10.1177/1471082X20936017},
  }