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Hausch, Donald B; Lo, Victor SY; Ziemba, William T . (2008). [World Scientific Handbook in Financial Economics Series] Efficiency of Racetrack Betting Markets Volume 2 || An Examination of Market Efficiency in British Racetrack Betting. , 10.1142/6910(), 551–562. doi:10.1142/9789812819192_0054 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research