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Peurach, Donald J.; Cohen, David K.; Yurkofsky, Maxwell M.; Spillane, James P. . (2019). From Mass Schooling to Education Systems: Changing Patterns in the Organization and Management of Instruction. Review of Research in Education, 43(1), 32–67. doi:10.3102/0091732X18821131 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research