Viscosity of Compressed Liquid 1,1,1-Trifluoroethane (HFC-143a) and Pentafluoroethane (HFC-125) Avelino, H.M.N.T.; Fareleira, J.M.N.A.; Oliveira, C.M.B.P.; Journal of Chemical & Engineering Data 2006, 51, 1672-1677