@misc{Koniewski_Maciej_Differential,
 author={Koniewski, Maciej and Majkut, Przemysław and Skórska, Paulina},
 howpublished={online},
 publisher={Educational Research Institute},
 language={pol},
 type={article},
 title={Differential item functioning between different forms of test booklets},
 keywords={psychometry, differential item functioning, DIF, standardization, Mantel–Haenszel test, logistic regression},
}