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Analecta. Studia i Materiały z Dziejów Nauki > 2018 > 27 > 1(52) > 249-264
IEEE Power and Energy Magazine > 2008 > 6 > 3 > 78 - 82
IEE Proceedings A - Physical Science, Measurement and Instrumentation,... > 1989 > 136 > 5 > 233 - 242