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Vahabi, Henri; Saeb, Mohammad Reza; Formela, Krzysztof; Cuesta, José-Marie Lopez . (2018). Flame retardant epoxy/halloysite nanotubes nanocomposite coatings: Exploring low-concentration threshold for flammability compared to expandable graphite as superior fire retardant. Progress in Organic Coatings, 119(), 8–14. doi:10.1016/j.porgcoat.2018.02.005 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research