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Karageorghis, Costas I.; Priest, David-Lee; Terry, Peter C.; Chatzisarantis, Nikos L. D.; Lane, Andrew M. . (2006). Redesign and initial validation of an instrument to assess the motivational qualities of music in exercise: The Brunel Music Rating Inventory-2. Journal of Sports Sciences, 24(8), 899–909. doi:10.1080/02640410500298107 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research