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Schoenmakers, Patrick P.J.M.; Hettinga, Florentina J.; Reed, Kate E. . (2019). The Moderating Role of Recovery Durations in High-Intensity Interval-Training Protocols. International Journal of Sports Physiology and Performance, (), 1–9. doi:10.1123/ijspp.2018-0876 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research