BERBER, L. C. .; KUUSISTO, E. .; TIRRI, K. . Teachers’ Perceptions of Gratitude in Classroom Interactions: A Case Study from Finland. International Journal of Learning, Teaching and Educational Research, [S. l.], v. 18, n. 5, p. 73–88, 2019. Disponível em: http://www.ijlter.myres.net/index.php/ijlter/article/view/567. Acesso em: 17 apr. 2026.