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Lye, Sze Yee; Koh, Joyce Hwee Ling . (2014). Review on teaching and learning of computational thinking through programming: What is next for K-12?. Computers in Human Behavior, 41(), 51–61. doi:10.1016/j.chb.2014.09.012 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research