Liudmyla Dmytrivna Nastenko-Kapaliet (2017) “How many churches there were in Kyiv in the 11th century and possible mistakes in translation of the ‘Chronicle’ of Thietmar von Merseburg”, Manuscript and book heritage of Ukraine, 21, pp. 572–576. Available at: https://ojs.nbuv.gov.ua/index.php/ojs/article/view/930 (Accessed: 21 September 2026).