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Damodaraiah, S.; Ratnakaram, Y.C. . (2018). Energy transfer studies and neutral to warm white light generation in Dy3+-Sm3+ co-doped bismuth phosphate glasses for lighting applications. Journal of Luminescence, (), S0022231318318878–. doi:10.1016/j.jlumin.2018.12.002 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research