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S Walter; E Balzano; G Vuillon-Cacciuttolo; R Naquet. (1971). Behavioural and electrographic effects of d-lysergic acid diethylamide (LSD 25) on the photosensitive Papio papio. , 30(4), 0–305. doi:10.1016/0013-4694(71)90112-x 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research