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Venet, P.; Lahyani, A.; Grellet, G.; Ah-Jaco, A. . (1999). Influence of aging on electrolytic capacitors function in static converters: Fault prediction method. The European Physical Journal Applied Physics, 5(1), 71–83. doi:10.1051/epjap:1999112 

An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research