P. V. Lukin, “Khorobrit and Dux Susdaliensis: The struggle for power in Vladimir-Suzdal in the late 1240s”, Shagi, vol. 12, no. 3, pp. 90–134, Mar. 2026, Accessed: Nov. 03, 2026. [Online]. Available: https://shagi.owebs.ru/article/view/34790