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H. Aloui; K. Khwaldia; M. Ben Slama; M. Hamdi. (2011). Effect of glycerol and coating weight on functional properties of biopolymer-coated paper. , 86(2), 1063–1072. doi:10.1016/j.carbpol.2011.06.026 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research