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L.A. Segall; J.S. Perrin; C.-D. Walker; J. Stewart; S. Amir. (2006). Glucocorticoid rhythms control the rhythm of expression of the clock protein, Period2, in oval nucleus of the bed nucleus of the stria terminalis and central nucleus of the amygdala in rats. , 140(3), 0–757. doi:10.1016/j.neuroscience.2006.03.037 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research