Isochoric Specific Heat Capacity of Difluoromethane (R32) and a Mixture of 51.11 mass% Difluoromethane (R32) +  48.89 mass% Pentafluoroethane (R125) Matsuguchi, A.; Yamaya, K.; Kagawa, N.; International Journal of Thermophysics 2008, 29, 1929-1938