Mohammadi, Ali, et al. “Simultaneous Determination of Irinotecan Hydrochloride and Its Related Compounds by High Performance Liquid Chromatography Using Ultraviolet Detection”. Asian Journal of Chemistry, vol. 22, no. 5, Mar. 2010, pp. 3966-72, https://asianpubs.org/index.php/ajchem/article/view/11636.