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Lyu, Ya; Ishida, Hatsuo . (2019). Natural-Sourced Benzoxazine Resins, Homopolymers, Blends and Composites: A Review of Their Synthesis, Manufacturing and Applications. Progress in Polymer Science, (), 101168–. doi:10.1016/j.progpolymsci.2019.101168 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research