THANOS , Theodoros; KATSIKAS , Apostolos. School Bullying in Primary Education: Forms and Frequency of Occurrence. International Electronic Journal of Elementary Education, [S. l.], v. 18, n. 4, p. 683–696, 2026. Disponível em: https://iejee.com/index.php/IEJEE/article/view/2713. Acesso em: 14 jul. 2026.