Boyanov, Petar. “Content of Vol. 5, 2014: Content of Vol. 5, 2014”. JOURNAL SCIENTIFIC AND APPLIED RESEARCH 5, no. 1 (March 8, 2023): 3–5. Accessed November 22, 2024. https://jsar.ftn.shu.bg/ojs-3.3.0-7/index.php/jsar/article/view/104.