Chipriyanova, Galina, and Miglena Marinova. “OPPORTUNITIES AND CHALLENGES IN MODELING AN ENVIRONMENTAL MANAGEMENT SYSTEM”. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June 13, 2023): 38–43. Accessed April 24, 2025. https://journals23.rta.lv/index.php/ETR/article/view/7245.