Schou-Bredal I, Grimholt T, Bonsaksen T, Skogstad L, Heir T, Ekeberg Øivind. Optimists’ and pessimists’ self-reported mental and global health during the COVID-19 pandemic in Norway. HPR [Internet]. 10 maj 2021 [cytowane 22 lipiec 2024];9(2):160–168. Dostępne na: https://czasopisma.bg.ug.edu.pl/index.php/HPR/article/view/5751