Marinow K. Foreword. In: Leszka MJ, editor. The Bulgarian State in 927-969. The Epoch of Tsar Peter I: No. XXXIV [Internet]. Poland: Lodz University Press; 2018 [cited 2026 Jan. 21]. pp. 1-3. (, editor. Byzantina Lodziensia). Available from: https://www.press.uni.lodz.pl/index.php/wul/catalog/book/1057/chapter/2721