Valk, Heiki. “Finnic Language Islands in Eastern Latvia: Archaeological Background and Perspective”. Eesti ja soome-ugri keeleteaduse ajakiri. Journal of Estonian and Finno-Ugric Linguistics 12, no. 2 (December 20, 2021): 95–122. Accessed December 21, 2024. https://ojs.utlib.ee/index.php/jeful/article/view/jeful.2021.12.2.04.