R. T, A., and E.-K. . T. I. “On the Procedures for the Extraction and Isolation of Flavonoids Present in the Methanolic Extract of Leaves of Acanthospermum Hispidiumdc”. International Journal of Natural Sciences Research, vol. 2, no. 2, Feb. 2014, pp. 20-29, https://archive.conscientiabeam.com/index.php/63/article/view/2312.