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Ongaratto, R. S., Lage, P. L. da C., & Borges, C. P. (2015). Physical properties of potassium pyrophosphate and its use in osmotic evaporation. Chemical Engineering Research and Design, 104, 497–502. doi:10.1016/j.cherd.2015.09.015 
10.1016/j.cherd.2015.09.015