KALVĀNS, Ēriks. Content of psychologycal well – being of Latgale population. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference, Rezekne, Latvia, v. 2, p. 13–26, 2015. DOI: 10.17770/sie2013vol2.537. Disponível em: https://archive-journals.rtu.lv/sie/article/view/1033.. Acesso em: 11 mar. 2026.