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Ulber, Roland; Sell, Dieter . (2007). [Advances in Biochemical Engineering/Biotechnology] White Biotechnology Volume 105 || Raw Materials. , 10.1007/978-3-540-45696-4(Chapter 31), 1–30. doi:10.1007/10_031 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research