Algvere, K. 2025. Adult L1 users’ attitudes towards their proficiency in written Estonian as evidence of deep-rooted language ideologies. Eesti ja soome-ugri keeleteaduse ajakiri. Journal of Estonian and Finno-Ugric Linguistics. 16, 2 (Feb. 2025), 5–50. DOI:https://doi.org/10.12697/jeful.2025.16.2.01.