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Shahrokhabadi, Hossein; Saeidi, Mohammadreza; Vaezzadeh, Majid; Shahivandi, Hamid; Salehian, Mehrdad . (2013). Base-growth mechanism of double-walled carbon nanotube in chemical vapor deposition. Journal of Crystal Growth, 371(), 56–59. doi:10.1016/j.jcrysgro.2013.02.003 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research