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Garcia, P.; Diez, D.; Anton, A.; Garrido, N.; Marcos, I.; Basabe, P.; Urones, J. . (2006). Stereoselective Synthesis of Cyclopropanols. Mini-Reviews in Organic Chemistry, 3(4), 291–314. doi:10.2174/157019306778742878 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research