Takahashi, Y.(2000). α-Difluoromethylornithine induces apoptosis as well as anti-angiogenesis in the inhibition of tumor growth and metastasis in a human gastric cancer model. International Journal of Cancer, 85(2), 243-247. doi:10.1002/(sici)1097-0215(20000115)85:2%3c243::aid-ijc15%3e3.0.co;2-2

Takahashi, Yutaka. "α-Difluoromethylornithine Induces Apoptosis As Well As Anti-angiogenesis in the Inhibition of Tumor Growth and Metastasis in a Human Gastric Cancer Model". International Journal of Cancer, 85.2 ( 2000 ): 243-247.