Ivanov, Sabin. “MONITORING OF THE STATUS OF CULTURAL HERITAGE SITES: MONITORING OF THE STATUS OF CULTURAL HERITAGE SITES”. JOURNAL SCIENTIFIC AND APPLIED RESEARCH 22, no. 1 (March 26, 2023): 10–14. Accessed November 21, 2024. https://jsar.ftn.shu.bg/index.php/jsar/article/view/332.