Zhelev, Yanislav, Mariya Monova-Zheleva, and Diana Sabotinova. “Workshop ‘Promoting the Green Transition through University Education on Green Standards’”. Digital Presentation and Preservation of Cultural and Scientific Heritage 13 (September 1, 2023): 353–358. Accessed May 10, 2024. https://dipp.math.bas.bg/dipp/article/view/dipp.2023.13.37.