Kalvāns, Ēriks. “SOCIALLY DEMOGRAPHIC PORTRAIT OF A HAPPY AND UNHAPPY RESIDENT OF LATGALE”.
SOCIETY. INTEGRATION. EDUCATION. Proceedings of the International Scientific Conference 7 (May 25, 2018): 84–94. Accessed April 5, 2025.
https://journals.rta.lv/index.php/SIE/article/view/3339.