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Pier Luigi Barili; Giancarlo Berti; Giorgio Catelani; Carlo Cini; Felicia D'Andrea; Ettore Mastrorilli. (1995). 4,6-O-Benzylidene-d-glucopyranose and its sodium salt: new data on their preparation and properties. , 278(1), 43–57. doi:10.1016/0008-6215(95)00227-8 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research