Iacopino, Fortunata, et al. “Characterization of Cancer Stem Cells (CSC) Isolated from LI, a Human Glioblastoma (GBM) Cell Line”. Italian Journal of Anatomy and Embryology, vol. 117, no. 2, Feb. 2013, p. 89, https://oajournals.fupress.net/index.php/ijae/article/view/4275.