Phase equilibrium data for binary mixtures of carbon dioxide with {1,1,2,3,3,3-hexafluoro-1-propene or 2,2,3-trifluoro-3-(trifluoromethyl)oxirane} at temperatures between (233 and 273) K Nelson, W.M.; Benecke, T.P.; Ramjugernath, D.; Fluid Phase Equilibria 2016, 425, 114-119