SALIJ, Pavlo. CHARACTERISTICS OF THE CORE METHODS OF STUDYING THE OPTIMISM OF OLDER ADOLESCENTS. Theoretical and Methodical Problems of Children and Youth Education, [S. l.], v. 27, n. 2, p. 174–187, 2023. DOI: 10.32405/2308-3778-2023-27-2-174-187. Disponível em: https://ojs.ipv.org.ua/index.php/journal/article/view/42. Acesso em: 26 jul. 2026.