"Onion (Allium Cepa L.) Bulb Crop Production Using Sets of Two Sudanese Cultivars". University of Khartoum Journal of Agricultural Sciences 27 (سبتمبر 19, 2021). تاريخ الوصول مايو 25, 2026. https://onlinejournals.uofk.edu/uofkjas/article/view/184.