Nikolov, Nikolay. “SMART CITIES AS A TOOL FOR ENVIRONMENTAL SUSTAINABILITY: OPPORTUNITIES AND CHALLENGES”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June 22, 2024): 261–266. Accessed June 30, 2024. https://journals.rta.lv/index.php/ETR/article/view/7948.