Jasielska, Dorota, i Joanna Rajchert. 2020. „When Is Happy Also Prosocial? The Relationship Between Happiness and Social Orientation Depends on Trust, Agency and Communion”. Current Issues in Personality Psychology 8 (4):309–316. https://czasopisma.bg.ug.edu.pl/index.php/CIiPP/article/view/5319.