Afolayan, A. J., and G. A. Otunola. “ULTRASTRUCTURE AND ELEMENTAL ANALYSIS OF HYPOXIS HEMEROCALLIDEA: A MULTIPURPOSE MEDICINAL PLANT”. African Journal of Traditional, Complementary and Alternative Medicines, vol. 11, no. 4, May 2014, pp. 39-43, https://athmsi.org/journals/index.php/ajtcam/article/view/2062.