To cite package ‘alien’ in publications use:

Buba Y (2024). alien: Estimate Invasive and Alien Species (IAS) Introduction Rates. R package version 1.0.2.9000, https://github.com/hezibu/alien.

Corresponding BibTeX entry:

  @Manual{,
    title = {alien: Estimate Invasive and Alien Species (IAS)
      Introduction Rates},
    author = {Yehezkel Buba},
    year = {2024},
    note = {R package version 1.0.2.9000},
    url = {https://github.com/hezibu/alien},
  }