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da Rosa Piccolo, Luciane; Weisleder, Adriana; Mendelsohn, Alan L. . (2020). Promoting Global Early Child Development Through Play: Two Sustainable, Effective Models. Pediatrics, (), e2020032433–. doi:10.1542/peds.2020-032433 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research