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Nair, Govind B.; Swart, H.C.; Dhoble, S.J. . (2019). A Review on the Advancements in Phosphor-converted Light emitting diodes (pc-LEDs): Phosphor Synthesis, Device Fabrication and Characterization. Progress in Materials Science, (), 100622–. doi:10.1016/j.pmatsci.2019.100622 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research