Palmaitis, Letas. „Indo-European Vowel Gradation and the Development of Declensional Models in the Aspect of Diachronic Typology“. Baltistica 16, no. 1 (rugsėjo 30, 1980): 93–94. žiūrėta balandžio 29, 2026. https://www.journals.vu.lt/baltistica/article/view/41057.