PREREQUISITES FOR THE DEVELOPMENT OF GREEN SYSTEMS IN BULGARIAN CITIES. World Science, [S. l.], n. 4(86), 2024. DOI: 10.31435/rsglobal_ws/30122024/8275. Disponível em: https://rspublisher.org/index.php/ws/article/view/3212. Acesso em: 17 mar. 2026.