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Gharzouni, A.; Joussein, E.; Samet, B.; Baklouti, S.; Pronier, S.; Sobrados, I.; Sanz, J.; Rossignol, S. . (2015). The effect of an activation solution with siliceous species on the chemical reactivity and mechanical properties of geopolymers. Journal of Sol-Gel Science and Technology, 73(1), 250–259. doi:10.1007/s10971-014-3524-0 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research