Jasiūnas, Henrikas, and Vitolda Verikaitė. “Mathematics Studies at the Faculty of Nature and Mathematics of Vilnius University 1940–1944”. Lietuvos matematikos rinkinys 47, no. spec. (June 14, 2021): 310–319. Accessed April 27, 2024. https://www.journals.vu.lt/LMR/article/view/24221.