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Cui, Xiaoneng; Zhang, Caishun; Xu, Kejing; Zhao, Jianzhang . (2015). Application of singlet energy transfer in triplet state formation: broadband visible light-absorbing triplet photosensitizers, molecular structure design, related photophysics and applications. J. Mater. Chem. C, (), 10.1039.C5TC01401H–. doi:10.1039/C5TC01401H 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research