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Fushimi, Kiyohide; Uchida, Shinichi; Harat, Yukichi; Hirata, Yukio; Marumo, Fumiaki; Sasaki, Sei. (1993). Cloning and expression of apical membrane water channel of rat kidney collecting tubule. , 361(6412), 549–552. doi:10.1038/361549a0 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research