Masao Takatori, and Makoto Yagi. “Biochemical Effect of Low-Level Radiation on Human Beings Examined by Directly Attached Radioactive Mineral”. Journal of Cancer Research Updates 8, no. 1 (April 5, 2019): 60–63. Accessed September 23, 2023. https://www.neoplasiaresearch.com/pms/index.php/jcru/article/view/531.