Attih, E. E., E. Johnson, E. . I Etim, H. . O Oladimeji, and O. . A Eseyin. “Validated Spectrophotometric Determination of Artesunate and Dihydroartemisinin Using Anisaldehyde/Sulphuric Acid Reagent”. Nigerian Journal of Pharmaceutical and Applied Science Research, vol. 10, no. 1, Mar. 2021, pp. 50-54, http://mail.nijophasr.net/index.php/nijophasr/article/view/426.