Y. M. Ahmed, G. A. E. Hassan, M. A. Hadad, and A. M. M., “Effect of Azospirillum Brasilense, Flavobacterium Spp. biofertilizers and Al Khasieb Organic fertilizer on growth and yield of Sweetpotato (Ipomoea batatas L.) under field conditions”, JAR, vol. 3, no. 10, pp. 49-68, Oct. 2016.