Isothermal (vapour + liquid) equilibrium for the binary {1,1,2,2-tetrafluoroethane (R134) + propane (R290)} and {1,1,2,2-tetrafluoroethane (R134) + isobutane (R600a)} systems Dong, X.; Gong, M.; Liu, J.; Wu, J.; The Journal of Chemical Thermodynamics 2010, 42, 1152-1157