Trubina, Irēna, Maruta Sīle, Evita Vaļēviča, and Daina Voita. “Computerized Attention Training Program and Vocal Ensemble Classes – Means of Adolescent Attention Focusing Ability Development”. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference 2 (July 24, 2015): 507–518. Accessed May 6, 2024. https://journals.ru.lv/index.php/SIE/article/view/645.