Pratiwi, Suci, et al. “The Relationship Between Programmed Death-Ligand 1 and Cancer Stem Cells in Ovarian Cancer: Implications for Immunotherapy”. Asian Pacific Journal of Cancer Biology, vol. 11, no. 4, Oct. 2026, pp. 1181-90, doi:10.31557/APJCB.2026.11.4.1181.