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Sheese, Brad E.; Brown, Erin L.; Graziano, William G. . (2004). Emotional Expression in Cyberspace: Searching for Moderators of the Pennebaker Disclosure Effect via E-Mail.. Health Psychology, 23(5), 457–464. doi:10.1037/0278-6133.23.5.457 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research