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García-Toyos, N.; March-Cerdá, J.C.; Chillón-Martínez, R.; Escudero-Carretero, M.J. . (2020). Atención sanitaria al malestar premenstrual. La perspectiva de las mujeres. Medicina de Familia. SEMERGEN, (), S1138359320303828–. doi:10.1016/j.semerg.2020.05.019 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research