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Allison, Mary K.; Martin, Brian J.; MacInnis, Martin J.; Gurd, Brendon; Gibala, Martin J. . (2016). Brief, Intense Intermittent Stair Climbing Is A Practical, Time-Efficient Method To Improve Cardiorespiratory Fitness. Medicine & Science in Sports & Exercise, 48(), 609–. doi:10.1249/01.mss.0000486830.80107.b2 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research