Isothermal vapor-liquid equilibrium at 333.15 K and excess volumes and molar refractivity deviation at 298.15 K for the ternary system di-butyl ether (1) + ethanol (2) + toluene (3) and its binary subsystems Kwak, H.Y.; Oh, J.H.; Park, S.J.; Paek, K.Y.; Fluid Phase Equilibria 2007, 262, 161-168