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Czekierda, Katarzyna; Banik, Anna; Park, Crystal L.; Luszczynska, Aleksandra . (2017). Meaning in Life and Physical Health: Systematic Review and Meta-analysis. Health Psychology Review, (), 1–67. doi:10.1080/17437199.2017.1327325 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research