Optimization of the urban green area in Erbil territory for sustainable development. Periodicals of Engineering and Natural Sciences, [S. l.], v. 11, n. 3, p. 203–216, 2023. DOI: 10.21533/pen.v11.i3.146. Disponível em: https://pen.ius.edu.ba/index.php/pen/article/view/146. Acesso em: 16 nov. 2025.