Isothermal vapor-liquid equilibrium data for the binary mixture ethyl fluoride (HFC-161) + 1,1,1,2,3,3,3-heptafluoroproane (HFC-227ea) over a temperature range from 253.15 K to 313.15 K Wang, Q.; Xu, Y.J.; Gao, Z.J.; Qiu, Y.; Min, X.W.; Han, X.H.; Chen, G.M.; Fluid Phase Equilibria 2010, 297, 67-71