Pencheva, Elena, and Maria Nikolaeva. “The Medieval Settlement in the Petrova Niva Locality, Sboryanovo Archaeological Reserve”. Contributions to Bulgarian Archaeology | Приноси към българската археология 13 (December 11, 2023): 77–124. Accessed November 12, 2025. https://publications.naim.bg/index.php/CBA/article/view/364.