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Logar, Vito; Kristl, Živa; Škrjanc, Igor . (2014). Using a fuzzy black-box model to estimate the indoor illuminance in buildings. Energy and Buildings, 70(), 343–351. doi:10.1016/j.enbuild.2013.11.082 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research