KALVĀNS, Ēriks. SOCIALLY DEMOGRAPHIC PORTRAIT OF A HAPPY AND UNHAPPY RESIDENT OF LATGALE. SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference, Rezekne, Latvia, v. 7, p. 84–94, 2018. DOI: 10.17770/sie2018vol1.3339. Disponível em: https://journals.rta.lv/index.php/SIE/article/view/3339.. Acesso em: 4 may. 2024.