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Luca Menghini;Dilara Yuksel;Aimee Goldstone;Fiona C. Baker;Massimiliano de Zambotti;. (2021). Performance of Fitbit Charge 3 against polysomnography in measuring sleep in adolescent boys and girls . Chronobiology International, (), –. doi:10.1080/07420528.2021.1903481 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research