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Maheswari, Lakshmanan; Sornavadivu, R.; Vijayalakshmi, S. . (2014). Modeling and Simulation of Buck Converter for Charging Battery by Solar Photovoltaic System. Applied Mechanics and Materials, 592-594(), 2379–2385. doi:10.4028/www.scientific.net/AMM.592-594.2379 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research