[1]
M. Jankowska, “Sources, conditions and types of anxiety in children and adolescents in the development aspect”, FeR, vol. 34, no. 2, pp. 131–163, Jun. 2018, Accessed: Jul. 15, 2025. [Online]. Available: https://fidesetratio.com.pl/ojs/index.php/FetR/article/view/521