To cite package ‘optical’ in publications use:

Ul Hassan M, Miller F (2024). optical: Optimal Item Calibration. R package version 1.8, https://github.com/scenic555/optical.

Corresponding BibTeX entry:

  @Manual{,
    title = {optical: Optimal Item Calibration},
    author = {Mahmood {Ul Hassan} and Frank Miller},
    year = {2024},
    note = {R package version 1.8},
    url = {https://github.com/scenic555/optical},
  }