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Gibbons, Michelle. (2019). Attaining landmark status: Rumelhart and McClelland's <i>PDP Volumes</i> and the Connectionist Paradigm. Journal of the History of the Behavioral Sciences, 55(1), 54–70. doi:10.1002/jhbs.21946 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research