Viitso, Tiit-Rein. “Expressions of Obligation, Duty, and Necessity in Livonian”. Eesti ja soome-ugri keeleteaduse ajakiri. Journal of Estonian and Finno-Ugric Linguistics 5, no. 1 (July 1, 2014): 193-214. Accessed January 28, 2023. https://ojs.utlib.ee/index.php/jeful/article/view/jeful.2014.5.1.10.