Gessmalla, Ammar Fadlalla, and Elamin Yousif A. Raddad. “Natural and Artificial Regeneration of Boswellia Papyrifera in the Blue Nile State – Sudan”. University of Khartoum Journal of Agricultural Sciences 23, no. 2 (March 28, 2023). Accessed April 4, 2025. http://onlinejournals.uofk.edu/index.php/uofkjas/article/view/1802.