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Raúl Peralta; Michael Baudis; Guelaguetza Vazquez; Sergio Juárez; Rocío Ortiz; Horacio Decanini; Dulce Hernandez; Francisco Gallegos; Alejandra Valdivia; Patricia Piña; Mauricio Salcedo. (2010). Increased expression of cellular retinol-binding protein 1 in laryngeal squamous cell carcinoma. , 136(6), 931–938. doi:10.1007/s00432-009-0735-9 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research