FILIPIAK, E. Discovering Teachers’ Personal Beliefs in Poland: Research Intervention Using Activity Theory. Educational Challenges, Kharkiv, UA, v. 28, n. 1, p. 18-34, 2023. DOI: 10.34142/2709-7986.2023.28.1.02. Disponível em: https://www.educationalchallenges.org.ua/index.php/education_challenges/article/view/179. Acesso em: 7 jun. 2026.