Walęcka-Matyja KK. Forgiveness and gratitude as predictors of the quality of the interpersonal relationship of adults siblings. FeR [Internet]. 2021 Mar. 26 [cited 2025 Jul. 27];45(1):104-2. Available from: https://fidesetratio.com.pl/ojs/index.php/FetR/article/view/695