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Klatzow, James; Becker, Jonas N.; Ledingham, Patrick M.; Weinzetl, Christian; Kaczmarek, Krzysztof T.; Saunders, Dylan J.; Nunn, Joshua; Walmsley, Ian A.; Uzdin, Raam; Poem, Eilon . (2019). Experimental Demonstration of Quantum Effects in the Operation of Microscopic Heat Engines. Physical Review Letters, 122(11), 110601–. doi:10.1103/PhysRevLett.122.110601 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research