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Reynders, G.; Diriken, J.; Saelens, D. . (2014). Quality of grey-box models and identified parameters as function of the accuracy of input and observation signals. Energy and Buildings, 82(), 263–274. doi:10.1016/j.enbuild.2014.07.025 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research