To cite the 'difNLR' package in publications use:

Hladka A, Martinkova P (2020). “difNLR: Generalized logistic regression models for DIF and DDF detection.” The R Journal, 12(1), 300–323. doi:10.32614/RJ-2020-014.

Hladka A, Martinkova P (2025). difNLR: DIF and DDF Detection by Non-Linear Regression Models. R package version 1.5.1-4, https://CRAN.R-project.org/package=difNLR.

Drabinova A, Martinkova P (2017). “Detection of differential item functioning with nonlinear regression: A non-IRT approach accounting for guessing.” Journal of Educational Measurement, 54(4), 498–517. doi:10.1111/jedm.12158.

Corresponding BibTeX entries:

  @Article{,
    title = {{difNLR}: Generalized logistic regression models for {DIF}
      and {DDF} detection},
    author = {Adela Hladka and Patricia Martinkova},
    year = {2020},
    doi = {10.32614/RJ-2020-014},
    pages = {300--323},
    volume = {12},
    number = {1},
    journal = {The R Journal},
  }

  @Manual{,
    title = {{difNLR}: {DIF} and {DDF} Detection by Non-Linear
      Regression Models},
    author = {Adela Hladka and Patricia Martinkova},
    year = {2025},
    note = {R package version 1.5.1-4},
    url = {https://CRAN.R-project.org/package=difNLR},
  }

  @Article{,
    title = {{D}etection of differential item functioning with
      nonlinear regression: {A} non-{IRT} approach accounting for
      guessing},
    author = {Adela Drabinova and Patricia Martinkova},
    year = {2017},
    journal = {Journal of Educational Measurement},
    volume = {54},
    number = {4},
    pages = {498--517},
    doi = {10.1111/jedm.12158},
    publisher = {Wiley Online Library},
  }