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Henderson, J. Bryan; MacPherson, Anna; Osborne, Jonathan; Wild, Andrew . (2015). Beyond Construction: Five arguments for the role and value of critique in learning science. International Journal of Science Education, 37(10), 1668–1697. doi:10.1080/09500693.2015.1043598 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research