LEVITSKAYA, Elena. Psychological Factors of Personal Activity Formation in Modern Adolescents. Approach to the Problem. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference, Rezekne, Latvia, v. 3, p. 244–253, 2015. DOI: 10.17770/sie2014vol3.734. Disponível em: https://archive-journals.rtu.lv/sie/article/view/878.. Acesso em: 11 mar. 2026.