Khalifa, Ahmed, 		Hamed, Ibtihal, 		Ahmed, Shaker, 		Ali, Mohamed, 		Ali, Imad-eldin, 		Heng, Lee, AND 		Dawoud, Dawoud.
" Influence of fertigation regimes on yield and fruit quality of grapefruit under Khartoum State conditions, Sudan" <em>Gezira Journal of Agricultural Science</em> [Online], Volume 16 Number 2 (1 December 2018)