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Bügl, Robert; Leimgruber, Christian; Hüni, Guido R.; Scholz, Roland W. . (2009). Sustainable property funds: financial stakeholders’ views on sustainability criteria and market acceptance. Building Research & Information, 37(3), 246–263. doi:10.1080/09613210902843494 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research