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Fashandi, Hossein; Pakravan, Hamid Reza; Latifi, Masoud . (2019). Application of modified carpet waste cuttings for production of eco-efficient lightweight concrete. Construction and Building Materials, 198(), 629–637. doi:10.1016/j.conbuildmat.2018.11.163 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research