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Leva, S.; Dolara, A.; Grimaccia, F.; Mussetta, M.; Ogliari, E. . (2015). Analysis and validation of 24 hours ahead neural network forecasting of photovoltaic output power. Mathematics and Computers in Simulation, (), S0378475415001238–. doi:10.1016/j.matcom.2015.05.010 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research