Grigorjevs, Juris, trans. “The Comparison of the Quality of Spoken and Sung Latvian Vowels [i:], [ɑ:] and [u:]”. Baltistica 46, no. 1 (January 28, 2026): 63–78. Accessed February 22, 2026. https://www.zurnalai.vu.lt/baltistica/article/view/39391.