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Jiménez, Jackson A.; Martínez, Fleming . (2006). Thermodynamic study of the solubility of acetaminophen in propylene glycol + water cosolvent mixtures. Journal of the Brazilian Chemical Society, 17(1), 125–134. doi:10.1590/S0103-50532006000100018 
An interview with Sci-Hub Founder Alexandra Elbakyan,Who exactly should pay for academic research