To cite package ‘TPXG’ in publications use:

  Kontemeniotis N, Tsagris M (2025). _TPXG: Two Parameter Xgamma &
  Poisson Xgamma: Regression & Distribution Functions_. R package
  version 1.0, <https://CRAN.R-project.org/package=TPXG>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {TPXG: Two Parameter Xgamma & Poisson Xgamma: Regression & Distribution
Functions},
    author = {Nikolaos Kontemeniotis and Michail Tsagris},
    year = {2025},
    note = {R package version 1.0},
    url = {https://CRAN.R-project.org/package=TPXG},
  }