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Müller, Alexander; Lorenz, Michael; Brachwitz, Kerstin; Lenzner, Jörg; Mittwoch, Kai; Skorupa, Wolfgang; Grundmann, Marius; Höche, Thomas . (2011). Fresnoite thin films grown by pulsed laser deposition: photoluminescence and laser crystallization. CrystEngComm, 13(21), 6377–. doi:10.1039/c1ce05265a 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research