S. Eltayeb Ahmed, B. E. Mohamed, and K. A. Karamalla, “Analytical Studies on the Gum Exudates from Anogeissus leiocarpus”, Pak. J. Nutr., vol. 8, no. 6, pp. 782–786, May 2009, doi: 10.3923/pjn.2009.782.786.