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Soto, Juan M.; Rodrigo, José A.; Alieva, Tatiana . (2017). Label-free quantitative 3D tomographic imaging for partially coherent light microscopy. Optics Express, 25(14), 15699–. doi:10.1364/oe.25.015699 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research