Awadalkareem, A.M., et al. “Protein, Mineral Content and Amino Acid Profile of Sorghum Flour As Influenced by Soybean Protein Concentrate Supplementation”. Pakistan Journal of Nutrition, vol. 7, no. 3, Apr. 2008, pp. 475–479, https://doi.org/10.3923/pjn.2008.475.479.