Isothermal vapor-liquid equilibrium at 333.15 K and excess molar volumes at 298.15 K for the ternary system di-isopropyl ether + n-propyl alcohol + toluene and its binary subsystems Hwang, I.C.; Park, S.J.; Lee, S.Y.; Ahn, H.S.; Fluid Phase Equilibria 2008, 270, 103-108