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 spalio 27, 2026. https://zurnalai.vu.lt/baltistica/article/view/41057.