WÓJCIAK, Aleksandra. Delta Questionnaire – adaptation of the instrument on a group of people with mild intellectual disability and a preliminary analysis of its psychometric properties. Quarterly Journal Fides et Ratio, [S. l.], v. 55, n. 3, p. 185–192, 2023. Disponível em: https://fidesetratio.com.pl/ojs/index.php/FetR/article/view/1200. Acesso em: 10 aug. 2025.