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Yi, Jongdarm; Choe, Goeun; Park, Junggeon; Lee, Jae Young . (2020). Graphene oxide-incorporated hydrogels for biomedical applications. Polymer Journal, (), –. doi:10.1038/s41428-020-0350-9 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research