E. Saviščevas, “Copies of Letters from Lithuanian Rulers, Beginning with Vytautas and Jogaila in an Excerpt from the 1575 Brest Castle Court Records, Reflecting a Dispute over the Newly Drawn Borders between the Grand Duchy of Lithuania and Poland Following the Union of Lublin”, LIS, vol. 57, pp. 107–115, Jul. 2026, doi: 10.15388/LIS.2026.57.7.