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Kazuo Kitamura; Kenji Kangawa; Mari Kawamoto; Yosinari Ichiki; Hisayuki Matsuo; Tanenao Eto. (1992). Isolation and characterization of peptides which act on rat platelets, from a pheochromocytoma. , 185(1), 0–141. doi:10.1016/s0006-291x(05)80966-0 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research