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Sirdeshmukh, Deepak; Singh, Jagdip; Sabol, Barry . (2002). Consumer Trust, Value, and Loyalty in Relational Exchanges. Journal of Marketing, 66(1), 15–37. doi:10.1509/jmkg.66.1.15.18449 

An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research