Density, Speed of Sound, and Refractive Index Measurements for the Binary Mixture (1, 4-Dioxane + Isobutyric Acid) at T = (295.15, 298.15, 301.15, 304.15, 307.15, 310.15, and 313.15) K Kouissi, T.; Toumi, A.; Bouanz, M.; Journal of Chemical & Engineering Data 2015, 60, 1975-1985