IBRAHIM, Sahar S. et al. Status of greenhouses in Khartoum and Gezira States, Sudan. Gezira Journal of Agricultural Science, [S.l.], v. 14, n. 2, mar. 2016. ISSN 1728-9556. Available at: <http://journals.uofg.edu.sd/index.php/gjas/article/view/121>. Date accessed: 21 july 2026.