Bolaji, Bukola Olalekan. “Performance of A R22 Split-Air-Conditioner When Retrofitted With Ozone Friendly Refrigerants (R410A and R417A)”. Journal of Energy in Southern Africa, vol. 23, no. 3, Aug. 2012, pp. 16-22, doi:10.17159/2413-3051/2012/v23i3a3168.