JUSUPOVIĆ, Adrian. The Relations of the Piasts with the Rurik Dynasty in Historiographical Compilation. Contemporary ‘Historical Collection’. Kwartalnik Historyczny. Online. 14 January 2022. Vol. 128, no. 4, pp. 991-1010. [Accessed 19 December 2025]. DOI 10.12775/KH.2021.128.4.06.