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Medbo, J. I.; Tabata, I. . (1993). Anaerobic energy release in working muscle during 30 s to 3 min of exhausting bicycling. Journal of Applied Physiology, 75(4), 1654–1660. doi:10.1152/jappl.1993.75.4.1654 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research