Vapor-liquid equilibrium data for the (hexafluoroethane + 1,1,1,2-tetrafluoroethane) system at temperatures from 263 to 353 K and pressures up to 4.16 MPa Madani, H.; Valtz, A.; Coquelet, C.; Meniai, A.H.; Richon, D.; Fluid Phase Equilibria 2008, 268, 68-73