W. Mądry, “Piast Burials Abroad as an Example of the Migration of Slavic Rulers in the Middle Ages and Early Modern Era”, in Migrations in the Slavic Cultural Space. From the Middle Ages to the Present Day , vol. 10, Z. A. Brzozowska, P. Kręzel, and I. Lis-Wielgosz, Eds. Poland: Lodz University Press, 2022, pp. 199–213. doi: 10.18778/8331-033-6.14.