Małkowska-Szkutnik, Agnieszka, and Joanna Mazur. 2019. “Burden of Chronic Conditions and Subjective Complaints As Factors Modifying the Way Polish Students Are Functioning at School”. Psycho-Educational Research Reviews 8 (1):55-63. https://perrjournal.com/index.php/perrjournal/article/view/193.