TRUBINA, Irena; SILE, Maruta. Development of Adolescent Individual Attention Focus Abilities during Vocal Ensemble Sessions. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference, Rezekne, Latvia, v. 2, p. 445–452, 2015. DOI: 10.17770/sie2015vol2.421. Disponível em: https://archive-journals.rtu.lv/sie/article/view/1122.. Acesso em: 11 mar. 2026.