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Hiroshi Handa; Upendra P. Hegde; Valery M. Kotelnikov; Suneel D. Mundle; Li-Ming Dong; Paul Burke; Sheldon Rose; Wei-Tong Hsu; Fred Gaskin; Azra Raza; Harvey D. Preisler. (1997). The effects of 13-cis retinoic acid and interferon-α in chronic myelogenous leukemia cells In vivo in patients. , 21(11-12), 1087–1096. doi:10.1016/s0145-2126(97)00090-8 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research