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C.C. Li. (2009). Discussion of the paper “The interaction between yielding supports and squeezing ground” by L. Cantieni and G. Anagnostou [Tunnelling and Underground Space Technology 24 (2009) 309–322]. , 24(6), 739–740. doi:10.1016/j.tust.2009.05.001 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research