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Haghayegh, Shahab; Khoshnevis, Sepideh; Smolensky, Michael H.; Diller, Kenneth R.; Castriotta, Richard J. . (2019). Before-Bedtime Passive Body Heating By Warm Shower Or Bath To Improve Sleep: A Systematic Review And Meta-Analysis. Sleep Medicine Reviews, (), S1087079218301552–. doi:10.1016/j.smrv.2019.04.008 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research