NEED FOR UPDATING OF REGULATORY REQUIREMENTS TO THE GREEN SYSTEM OF THE CITY OF SOFIA. World Science, [S. l.], n. 2(74), 2022. DOI: 10.31435/rsglobal_ws/28022022/7770. Disponível em: https://rspublisher.org/index.php/ws/article/view/2254. Acesso em: 17 mar. 2026.