Diemantaitė, Vita. “Activities of the Grand Duchy of Lithuania Chancellery under the Management of Leon Sapieha (1585–1623)”. Lietuvos istorijos studijos 45 (July 21, 2020): 47–60. Accessed April 27, 2025. https://journals.vu.lt./lietuvos-istorijos-studijos/article/view/18868.