Mataa, M., B. Makungu, and I. Siziya. “Shading Effects of Intercropping Roselle (Hibiscus Sabdariffa) Genotypes on Plant Development, Assimilate Partitioning and Leaf Nutrient Content”. International Journal of Agricultural Research, Innovation and Technology, vol. 8, no. 1, Sept. 2018, pp. 7-13, doi:10.3329/ijarit.v8i1.38223.