Боцман, А. В., and І. М. Моренець. “Indo-European and Common Germanic Roots of the Preterito-Presentia Verbs”. Studia Philologica, no. 2 (July 8, 2019): 39–46. Accessed December 10, 2025. https://studiap.kubg.edu.ua/index.php/journal/article/view/284.