Critical Parameters Measurements of Four HFE + HFC Binary Systems: Pentafluoromethoxyethane (HFE-245Mc) + Pentafluoroethane (HFC-125), + 1,1,1,2-Tetrafluoroethane (HFC-134a), + 1,1,1,2,3,3,3-Heptafluoropropane (HFC-227ea), and + 1,1,1,2,3,3-Hexafluoropropane (HFC-236ea) Otake, K.; Uchida, Y.; Yasumoto, M.; Yamada, Y.; Furuya, T.; Ochi, K.; Journal of Chemical & Engineering Data 2004, 49, 1643-1647