Leppik, K. and Tejedor-García, C. (2019) “Estoñol, a computer-assisted pronunciation training tool for Spanish L1 speakers to improve the pronunciation and perception of Estonian vowels”, Eesti ja soome-ugri keeleteaduse ajakiri. Journal of Estonian and Finno-Ugric Linguistics. Tartu, Estonia, 10(1), pp. 89–104. doi: 10.12697/jeful.2019.10.1.05.