Please cite the cotram package by the following reference:

  Sandra Siegfried, Torsten Hothorn (2020). Count Transformation
  Models. Methods in Ecology and Evolution, 2020; 11:7 818-827.
  https://doi.org/10.1111/2041-210X.13383

A BibTeX entry for LaTeX users is

  @Article{,
    title = {Count Transformation Models},
    author = {Sandra Siegfried and Torsten Hothorn},
    journal = {Methods in Ecology and Evolution},
    year = {2020},
    volume = {11},
    number = {7},
    pages = {818--827},
    doi = {10.1111/2041-210X.13383},
  }