Celik, Feyzi, and Tugce Duran. “Effects of Fentanyl on Pancreatic Cancer Cell Proliferation and Cancer Stem Cell Differentiation”. Cellular and Molecular Biology 65, no. 7 (September 30, 2019): 21–25. Accessed November 23, 2024. https://cellmolbiol.org/index.php/CMB/article/view/3125.