Densities, speeds of sound, and refractive indices for binary mixtures of 1-butyl-3-methylimidazolium methyl sulphate ionic liquid with alcohols at T = (298.15, 303.15, 308.15, and 313.15)K Singh, S.; Aznar, M.; Deenadayalu, N.; The Journal of Chemical Thermodynamics 2013, 57, 238-247