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Palancar, Enrique L.; Léonard, Jean Léo . (2016). Tone and Inflection (New Facts and New Perspectives) || 10. Abstract and concrete tonal classes in Itunyoso Triqui person morphology. , 10.1515/9783110452754(), –. doi:10.1515/9783110452754-010 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research