Pancheva, Stanislava. “Opportunities for Optimizing the Education System in the Republic of Bulgaria by Increasing the Efficiency and Sustainability of the Higher Education-Science-Business Relationship”. Economy and Business Yearbook 8 (December 30, 2023): 136–144. Accessed December 7, 2025. https://ojs.nbu.bg/index.php/EcoBY/article/view/1346.