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Mayagoitia, Vicente; Rojas, Fernando; Kornhauser, Isaac; Ancona, E.; Zgrablich, Giorgio; Faccio, Roberto José . (1996). Twofold Description of Topological Disordered Surfaces <sup>†</sup>. Langmuir, 12(1), 207–210. doi:10.1021/la9407065 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research