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, vol. 23, no. 2, Mar. 2023, doi:10.53332/uofkjas.v23i2.1802.