H. B. . Umata and A. H. . Debelo, “Determination of Plant Density on Yield of Sorghum Intercropping with Haricot Bean at Fadis and Babile”, ABC j. adv. res., vol. 7, no. 1, pp. 9–16, Jun. 2018, doi: 10.18034/abcjar.v7i1.74.