BOYANOV, P. Content of vol. 30, 2026, Journal Scientific and Applied Research: Content of vol. 30, 2026, Journal Scientific and Applied Research. JOURNAL SCIENTIFIC AND APPLIED RESEARCH, [S. l.], v. 30, n. 1, p. 4–5, 2026. DOI: 10.46687/jsar.v30i1.474. Disponível em: https://jsar.ftn.shu.bg/index.php/jsar/article/view/474. Acesso em: 5 nov. 2026.