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 22, 2024. https://jsar.ftn.shu.bg/ojs-3.3.0-7/index.php/jsar/article/view/332.