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Choi, Minkee; Cho, Hae Sung; Srivastava, Rajendra; Venkatesan, Chithravel; Choi, Dae-Heung; Ryoo, Ryong. (2006). Amphiphilic organosilane-directed synthesis of crystalline zeolite with tunable mesoporosity. , 5(9), 718–723. doi:10.1038/nmat1705 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research