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Chiqueto, Kelly; Henriques, José Fernando Castanha; Barros, Sérgio Estelita Cavalcante; Janson, Guilherme . (2013). Angle Class II correction with MARA appliance. Dental Press Journal of Orthodontics, 18(1), 35–44. doi:10.1590/s2176-94512013000100011 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research